shelbyguy470 Posted July 31, 2008 Report Share Posted July 31, 2008 When I got the Paxton installed I missed that great roar the GT had. I went down to my local muffler shop and spoke with the owner, a mustang owner. I ordered a set of Magnaflow mufflers. When the mufflers came in I dropped off the Shelby. About two hours later my buddy called and said that he thought it was still to quiet, but he had an idea.... Run with no resonators! At first I was very hesitant. I came down to the shop and took the Shelby for a drive with the pipes cut at the axel, and it sounded good! The deal was I could try the Shelby out without the resonators and if I didn't like it, he would put the muffler of my choice on. I have been driving it for a week and found it not too loud at all and it added a decent amount of power. I am vey happy with the outcome of my experment and thought I would share it with the group. Oh yeah, the ROAR is back!! Russ Link to comment Share on other sites More sharing options...
RogerS Posted August 1, 2008 Report Share Posted August 1, 2008 Nice Russ! I think a few members have chose the same route and they are happy also. Roger Link to comment Share on other sites More sharing options...
SGT2666 Posted August 1, 2008 Report Share Posted August 1, 2008 I had read good things about the muffler delete but I was very nervous when I did it. I'm still fairly amazed I love the sound, not overly loud and no drone. :happy feet: Link to comment Share on other sites More sharing options...
zdle Posted August 2, 2008 Report Share Posted August 2, 2008 How is a muffler delete done , besides the obvious................do ya have to do anything special..? ZDS Link to comment Share on other sites More sharing options...
SGT2666 Posted August 2, 2008 Report Share Posted August 2, 2008 How is a muffler delete done , besides the obvious................do ya have to do anything special..? ZDS Its a 30 min job to intall SLP loudmouths no welding just pop off the old and install the new. An impact gun is handy to get things good and tight. Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted August 2, 2008 Report Share Posted August 2, 2008 I like the idea of the axle-back, bolt-in, replacement. No permanent mod, (I think), and therefore you can easily return to stock configuration. A couple of questions for those running the SLP Loudmouths: Is this the model you've installed?: http://www.americanmuscle.com/axexlmo20mug.html Note the RED statement about changing the exhaust hangers - was this necessary? Sam AKA: Link to comment Share on other sites More sharing options...
SGT2666 Posted August 3, 2008 Report Share Posted August 3, 2008 I like the idea of the axle-back, bolt-in, replacement. No permanent mod, (I think), and therefore you can easily return to stock configuration. A couple of questions for those running the SLP Loudmouths: Is this the model you've installed?: http://www.americanmuscle.com/axexlmo20mug.html Note the RED statement about changing the exhaust hangers - was this necessary? Sam AKA: They come with the hangers installed, you just pull the old and mount the new. That is the correct part these guys were the best buy when I got mine LMPerformance. Link to comment Share on other sites More sharing options...
BossBronco Posted August 3, 2008 Report Share Posted August 3, 2008 I did this mod today and I love it . Took 45 min. Working alone in the drive way alone. Three more mods to go . Break duct,pit strips& headers someday. Link to comment Share on other sites More sharing options...
Strawman Posted August 3, 2008 Report Share Posted August 3, 2008 When I got the Paxton installed I missed that great roar the GT had. I went down to my local muffler shop and spoke with the owner, a mustang owner. I ordered a set of Magnaflow mufflers. When the mufflers came in I dropped off the Shelby. About two hours later my buddy called and said that he thought it was still to quiet, but he had an idea.... Run with no resonators! At first I was very hesitant. I came down to the shop and took the Shelby for a drive with the pipes cut at the axel, and it sounded good! The deal was I could try the Shelby out without the resonators and if I didn't like it, he would put the muffler of my choice on. I have been driving it for a week and found it not too loud at all and it added a decent amount of power. I am vey happy with the outcome of my experment and thought I would share it with the group. Oh yeah, the ROAR is back!! Russ How did the Paxton impact the exhaust sound? Is this the same for the KB and Whipple? Link to comment Share on other sites More sharing options...
shelbyguy470 Posted August 3, 2008 Author Report Share Posted August 3, 2008 How did the Paxton impact the exhaust sound? Is this the same for the KB and Whipple? The Paxton acts as a "muffler" for the intake. The stock goes directly into the intake without any restrictions. With the Paxton the air is increased by the fins of the supercharger that also cuts down the sound some. Don't get me wrong, the S/C is the way to go, I just really like the sound of the Stock Shelby's intake. :happy feet: Link to comment Share on other sites More sharing options...
LuLu Posted August 3, 2008 Report Share Posted August 3, 2008 470...I think I follow what you are explaining, but I don't agree with your conclusions re: supercharging reducing exhaust tone, or, acting as a muffler. In N/A configurations with a low restriction induction system in place, WOT will produce a very sexy howl, much like the secondaries of old school QuadraJet carbs opening up. This is an awesome sound for many folks, very sweet. However, it's the product of extreme suction into the upper intake manifold through fixed (twin 57mm) throttle body ports. Like someone blowing a bugle, but in reverse. Combine a fixed bottleneck with adjustable air flow (sucked or blown through), and you will hear tones, play music and music indeed plays when the 4.6L-3V takes a deep breath and sucks CFM through a twin 57mm TB. Supercharging (in any form) replaces this suction with forced induction, and the N/A howl is heard no more because it's countered by forced air pushing through the TB. The whine (of any blower) is not just the meshing of mechanical gears and belt drives, it also comes from forcing air through the throttle body in a true "bugle" fashion. This is also a sweet sound, and the original howl is still there, but it is overshadowed by other sounds relevent to the mechanicals present and delivering boost. Moreover, I've never seen a "resonator" for an S197. I know they exist on other automobiles, the Marauders had mufflers and resonator tips. However, a resonator still "processes" exhaust gasses through some type of exhaust tail pipe restriction (usually a "neck-down to a smalled OD). Mufflers have baffle chambers that blend and cool exhaust gasses as they pass through, and resonators after the muffler adjust to specific tones. Resonators can be added to tune a specific frequency and reduce NVH. Thus...SLP Loudmouths may be "resonators", or, just advertised as such to reassure nervous customers. But, I believe they are just plain old open pipe. Quite expensive for just that too, IMHO. I went another route. I went to my local Midas and talked with their pipe expert. He was able to form two mandrel bent open pipes that replace the factory muffler, at the factory "top of the axle" mounting location. He added hangers that met up with OEM frame locations, and I also extended the tips (using Shelby tips from SPP) past the lower rear facia to move the exhaust vibration (vibration is sound) out past the passenger and trunk compartment. No howl, no drone at any speed, no pipes banging aginst the frame under power, or, even when just running hot or cold, and no exhaust cut-outs required. This is the way to go if you have access to a real exhaust professional for a tailored install. 158 bucks out the door, go figure? Thus...LuLu has open pipe from the cats back, and all bolted in place. I can restore the OEM system in 1 hour. Note: LuLu is very LOUD when she's WOT, yet very tame and pleasant at idle and low RPM cruising (even at highway) speeds. However, this mod is NOT for everyone. One man's music is another man's noise. But, if you give it a try and you like it...Cool. If you don't, no harm done. Muffler delete...Don't leave home without it... Link to comment Share on other sites More sharing options...
shelbyguy470 Posted August 4, 2008 Author Report Share Posted August 4, 2008 LuLu, I think you have misunderstood me. As I said in my last post the supercharger acts as a muffler for the intake. I did not mean to infer that it quiets the exhaust. The supercharger does reduce the sound of the intake (As noted by my very own ears). All I was saying was the addition (or subtraction I should say) of exhaust parts increased the exhaust sound under acceleration. I am so sorry I called the muffler a resonator, my bad, I thought that was what it was called. I will endeavor to be more eloquent and correct in the future. My pipe was also made by a exhaust specialist in a muffler shop, we do not have a Midas in North Lake Tahoe. The pipe is stainless steel and follows the exact bend of the stock pipe and attaches to the stock mounting locations. The tips from the original exhaust were welded onto the pipe to maintain the original look. Link to comment Share on other sites More sharing options...
LuLu Posted August 4, 2008 Report Share Posted August 4, 2008 LuLu, I think you have misunderstood me. As I said in my last post the supercharger acts as a muffler for the intake. I did not mean to infer that it quiets the exhaust. The supercharger does reduce the sound of the intake (As noted by my very own ears). All I was saying was the addition (or subtraction I should say) of exhaust parts increased the exhaust sound under acceleration. I am so sorry I called the muffler a resonator, my bad, I thought that was what it was called. I will endeavor to be more eloquent and correct in the future. My pipe was also made by a exhaust specialist in a muffler shop, we do not have a Midas in North Lake Tahoe. The pipe is stainless steel and follows the exact bend of the stock pipe and attaches to the stock mounting locations. The tips from the original exhaust were welded onto the pipe to maintain the original look. I understood you just fine, my friend. At least by the words you left here. My comments are not directed at you personally, but offered as redirection for many others who read here and sometimes post replies. It's not unusual for many of us to mis-name certain elements of the SGT power train. Many folks call the SGT induction system a "cold air intake" when the "intake" is actually the upper intake manifold (that black plastic stuff after the throttle body). The induction system (and 90mm TB) is not a"cold air" system at all, and it's seperated from the "intake" manifold by the TB, but it IS what folks call it. So...Why argue over labels? Same difference with "muffler" and "resonator", just a matter of labels. But, as long as we agree about what we are exchanging thoughts about, it's all good. I am pleased you enjoy you exhaust mods as I (and LuLu) enjoy them. I've read a lot of posts here where folks have replaced factory SGT exhaust components with aftermarket systems and I wonder why, when open pipe feels (and sounds) so much better. Enjoy. Link to comment Share on other sites More sharing options...
07SGT-C Posted August 16, 2008 Report Share Posted August 16, 2008 I agree with LuLu, don't waste your money on expensive mufflers...go muffler deletes with PYPES, sounds equally as good if not better in my opinion. I love my muffler deletes, best $189 i ever spent from Brenspeed! :happy feet: Oh and I forgot to mention the best thing is you don't get that annoying resonating at highway speed, car quiets right down to stock I don't have a video of my SGT but i found this 05 GT with PYPES muffler deletes on boob tube...some may think its too loud but i think it makes mine sound like a Shelby should sound....just keep your foot out of the throttle in town or when you see the law oh and dont be dissapointed on your first initial cold startup crackle sound from the pipes sitting parked and revving....the crackling sound goes away when its under load while driving PYPES Link to comment Share on other sites More sharing options...
blueone Posted August 18, 2008 Report Share Posted August 18, 2008 I like the idea of the axle-back, bolt-in, replacement. No permanent mod, (I think), and therefore you can easily return to stock configuration. A couple of questions for those running the SLP Loudmouths: Is this the model you've installed?: http://www.americanmuscle.com/axexlmo20mug.html Note the RED statement about changing the exhaust hangers - was this necessary? Sam AKA: Yes ,that is the model I have installed and that is also where I bought them(great service and shipping).Ford went to all rubber hangers on mid 07s and 08 cars and the kit incluedes 2 stainless hangers(brackets) for the rear. Which will keep the tips from vibrating and moving around. Since you have a 07 you might not need the kit. Just look at the rear bracket(hanger) and see if it has a metal band around the rubber and if it does you will not need the kit. Simple install thats easy to change back. I have enjoyed mine since I installed them and have had no regrets at all. By the way mine is a 08 SGT. Jeff Link to comment Share on other sites More sharing options...
LuLu Posted August 18, 2008 Report Share Posted August 18, 2008 LuLu, I think you have misunderstood me... ...My pipe was also made by a exhaust specialist in a muffler shop, we do not have a Midas in North Lake Tahoe. The pipe is stainless steel and follows the exact bend of the stock pipe and attaches to the stock mounting locations. The tips from the original exhaust were welded onto the pipe to maintain the original look. Good for you, sir. Now I know what you are hearing. Great sound, eh? ...Simple install thats easy to change back. I have enjoyed mine since I installed them and have had no regrets at all. By the way mine is a 08 SGT.Jeff Yep...That's part of the program. Keep it easy to restore to native/natural SGT status. I like tooling around with my SGT, but I keep all my OEM parts within arm's reach for restoration to factory SAI stock. Happy to hear you went this way too. It's the best an SGT can sound. Happy motoring, gents. Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted August 19, 2008 Report Share Posted August 19, 2008 Yes ,that is the model I have installed and that is also where I bought them(great service and shipping).Ford went to all rubber hangers on mid 07s and 08 cars and the kit incluedes 2 stainless hangers(brackets) for the rear.Which will keep the tips from vibrating and moving around. Since you have a 07 you might not need the kit. Just look at the rear bracket(hanger) and see if it has a metal band around the rubber and if it does you will not need the kit. Simple install thats easy to change back. I have enjoyed mine since I installed them and have had no regrets at all. By the way mine is a 08 SGT. Jeff Thanks Jeff, I looked at the rear bracket (immediately behind the muffler) and it indeed has a metal "surround", so I guess I'll go "Kit-less"! Sam AKA: Link to comment Share on other sites More sharing options...
Mustang_Scotty Posted August 20, 2008 Report Share Posted August 20, 2008 Is this a true representation of the sound without mufflers? Link to comment Share on other sites More sharing options...
stump_breaker Posted August 20, 2008 Report Share Posted August 20, 2008 Is this a true representation of the sound without mufflers? Nope but this is. My SGT no mufflers - http://media.putfile.com/SGTRAWWITH-COMPRESSION Link to comment Share on other sites More sharing options...
LuLu Posted August 20, 2008 Report Share Posted August 20, 2008 Nope but this is. My SGT no mufflers - http://media.putfile.com/SGTRAWWITH-COMPRESSION Niiiice... Link to comment Share on other sites More sharing options...
Mustang_Scotty Posted August 20, 2008 Report Share Posted August 20, 2008 What are you using for pipes? Nope but this is. My SGT no mufflers - http://media.putfile.com/SGTRAWWITH-COMPRESSION Link to comment Share on other sites More sharing options...
stump_breaker Posted August 20, 2008 Report Share Posted August 20, 2008 What are you using for pipes? No pipes. That was mufflers removed and dumping right past the axle. I just wanted to hear what they sounded like and afterwards reinstalled my stock mufflers. I was curious as to how the X-pipe affected the sound and except for the lack of "stereo" effect of the different sides hitting at different times, not too much. If/when I finally get around to upgrading the exhaust system it will be straight pipes all the way. Right now I am on a budget to have my Titan paid off in nine months so there is little extra money for mods floating around and the stock mufflers are wearing nicely. Link to comment Share on other sites More sharing options...
rnoggle Posted August 20, 2008 Report Share Posted August 20, 2008 Add me to the growing list of "mufflerless". I picked up a used set of SLP loudmouths off ebay for a decent price and installed them this past weekend. What a difference in sound. Love it!!!! Link to comment Share on other sites More sharing options...
LuLu Posted August 20, 2008 Report Share Posted August 20, 2008 Add me to the growing list of "mufflerless". I picked up a used set of SLP loudmouths off ebay for a decent price and installed them this past weekend. What a difference in sound. Love it!!!! Good for you, sir! Muffler delete has (for me) the best sound for an SGT, once you learn to manage the throttle. Very demure in close quarters, very efficient in balls out WOT. Congrats! Link to comment Share on other sites More sharing options...
Super Snake Posted August 20, 2008 Report Share Posted August 20, 2008 SLP Loudmouth Muffler delete Link to comment Share on other sites More sharing options...
Mustang_Scotty Posted August 22, 2008 Report Share Posted August 22, 2008 Took off the Boom Tubes and sent them back. Drove mufflerless for a while and dont really like it. It sounds great WOT but thats it for me. So I picked up Ford Racing M-5230-5GT's NEW, for a great price of $409.00. So this will suffice for now. Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted August 27, 2008 Report Share Posted August 27, 2008 I put on the SLP Loudmouths Monday night. It was a relatively straight forward removal and install, just took a bit longer than I planned, (about an hour and a half), and I only got one scraped finger. (Two of the hanger bolts are above the stock muffler and a bit tough to reach.) I fired up the Shelby for a test idle - I thought it sounded to loud, and I started to believe I'd made a mistake! Anyway, yesterday I took her out for a test drive, and discovered that it wasn't as loud as I initially thought, as a matter of fact, it's very pleasant. WOT it sounds awesome, with a nice burble on deceleration. Idle is more agressive than stock, and very tolerable. There is no droning, regardless of speed or window position. Except during WOT, conversation at normal voice levels is unaffected. Pros: All good, I'm keeping them! Cons: Chrome tips are a noticeably smaller diameter than stock SGT, more like a regular GT. Maybe it's just me, but when the engine/pipes are cold, the sound seems harsh - after warm up, no issues. Unexpected benefit: I had an annoying rattle from the door of the glove box that I can't detect anymore! Final word: If your considering this mod - go for it! You won't be disappointed! Sam AKA: Link to comment Share on other sites More sharing options...
strong_j Posted October 10, 2008 Report Share Posted October 10, 2008 omg i went down to my local exhuast shop and he did the deletes for 100 bucks (stainless steel, mandrel bent) and i absolutely love it.. i was kinda hesitant at first, but now i totally recommend it if you like the great sounds a v-8 makes.. :D you will not be disappointed Link to comment Share on other sites More sharing options...
356FQUA Posted January 4, 2009 Report Share Posted January 4, 2009 I have been thinking about going this route but I have been told this is not street legal and as much as I like the sound I really don't want to put the mufflers back on for state inspection once a year. Any thoughts? Link to comment Share on other sites More sharing options...
2007_Shelby_GT Posted January 4, 2009 Report Share Posted January 4, 2009 I have been thinking about going this route but I have been told this is not street legal and as much as I like the sound I really don't want to put the mufflers back on for state inspection once a year. Any thoughts? There is a distinct possibility that it may not be legal, depending upon your location! Note however, that removing the muffler does NOT involve removing the catalytic converters - THAT would be illegal for street use! Though I have now returned to stock mufflers, I can say that mufflerless sounds great! In my case, what brought me back to stock was a persistent whine from a certain passenger that only went away when I put the mufflers back on! Sam AKA: Link to comment Share on other sites More sharing options...
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