jo137649 Posted November 11, 2010 Report Share Posted November 11, 2010 KR Owners, Looking at the new SPP catalogue, they are offering a Muffler delete system that happens to also be compatible with our KR's for around $279. It claims to deliver a more intense sound with some performance benefit and they also say that its a bolt on part. Is there any of you KR owners that have done this to your KR? If so, could you please provide your feedback/review on it (good/bad/risks). Our KR's are plenty loud but I am very interested in doing it if its a significant increase. Thanks!!! Link to comment Share on other sites More sharing options...
CrzyHorse Posted November 11, 2010 Report Share Posted November 11, 2010 KR Owners, Looking at the new SPP catalogue, they are offering a Muffler delete system that happens to also be compatible with our KR's for around $279. It claims to deliver a more intense sound with some performance benefit and they also say that its a bolt on part. Is there any of you KR owners that have done this to your KR? If so, could you please provide your feedback/review on it (good/bad/risks). Our KR's are plenty loud but I am very interested in doing it if its a significant increase. Thanks!!! Its an unbelievably thunderous sound. I experimented a bit with it. Only negative is drowning out the supercharger. Also I dont believe you will see gains. Judging from seat of the pants feel I felt it was actually slower. Could be a backpressure issue. Link to comment Share on other sites More sharing options...
FiaCobra Posted November 11, 2010 Report Share Posted November 11, 2010 Is it like the SLP "loud mouth" set up ? Link to comment Share on other sites More sharing options...
jmn444 Posted November 11, 2010 Report Share Posted November 11, 2010 I've not heard many other deletes other than on internet videos, but I've loved my pypes deletes, no popping or overly raw sound, just loud bad ass exhaust. They actually sound better with the blower, not a lot different, but a noticeable change in pitch/tone whatever... good stuff! obviously mine aren't on a KR, but I would guess the sound is similar to a point... Link to comment Share on other sites More sharing options...
shelbykam Posted November 11, 2010 Report Share Posted November 11, 2010 They can be found here: http://www.shelbystore.com/product-p/z32-9a150.htm Link to comment Share on other sites More sharing options...
oldlugs Posted November 11, 2010 Report Share Posted November 11, 2010 ..and I was actually thinking of making mine quieter... I'm pretty sure that you won't see any performance gains over the straight-through muffler that comes on the KR, except from dropping a couple of pounds weight.. Link to comment Share on other sites More sharing options...
09KR0058 Posted November 11, 2010 Report Share Posted November 11, 2010 Wow. Those are very tempting. It says "bolt-on installation". Just wondering what the effort would be to go back and forth between them and the mufflers. Any guesses as to how long it would take to take the mufflers off and put these on? Link to comment Share on other sites More sharing options...
jmn444 Posted November 11, 2010 Report Share Posted November 11, 2010 It doesn't take very long at all, I want to say 4 bolts on either side for the hangars, and loosen the clamps and you can swap them out fairly quick. 1-2 beers and you are done Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted November 11, 2010 Report Share Posted November 11, 2010 They can be found here: http://www.shelbystore.com/product-p/z32-9a150.htm Hmm. Those look suspiciously like the Roush muffler deletes that come in the trunk of the 427R's. In fact, other than the "Roush" logo on the tips they look *exactly* like the Roush muffler deletes that come with the 427R's. And if they are the same item, they sound GREAT when installed. Phill Link to comment Share on other sites More sharing options...
shelbykam Posted November 11, 2010 Report Share Posted November 11, 2010 Ours are manufactured by MRT. I am not sure if Roush uses them as well. Link to comment Share on other sites More sharing options...
Captain Beyond Posted November 12, 2010 Report Share Posted November 12, 2010 Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted November 12, 2010 Report Share Posted November 12, 2010 Ours are manufactured by MRT. I am not sure if Roush uses them as well. That's okay. You (at least *I*) can't find just the muffler deletes that are part of the 427R package (customer installed) for 2010 models. You have to buy the full "cat back" exhaust system for $585.oo so it's pretty much a moot point. I was just pointing out that they look *exactly* like the Roush 427R deletes...which I wish I could'a found before buying the whole Extreame exhaust from Roush! Roush makes quite a lot of his own stuff 'in-house' but you might be right, he might use a outsourced company to make his exhaust for him. But now I'm curious..who is "MRT"? Phill Link to comment Share on other sites More sharing options...
shelbykam Posted November 12, 2010 Report Share Posted November 12, 2010 It's short for Mustang Racing Technologies. They are out of MI. This link here shows our exhaust options and the manufacture. B) Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted November 12, 2010 Report Share Posted November 12, 2010 It's short for Mustang Racing Technologies. They are out of MI. Hmmm, again. Isn't Roush out of MI? That would make even more sense! I suspect even more now, that they are one and the same (other than the Roush logo on the tips) items. Phill Link to comment Share on other sites More sharing options...
twicebitten Posted November 12, 2010 Report Share Posted November 12, 2010 ..and I was actually thinking of making mine quieter... I'm pretty sure that you won't see any performance gains over the straight-through muffler that comes on the KR, except from dropping a couple of pounds weight.. hey there is a saying "if its too loud your too old" j/k peace out Link to comment Share on other sites More sharing options...
jo137649 Posted November 13, 2010 Author Report Share Posted November 13, 2010 Its an unbelievably thunderous sound. I experimented a bit with it. Only negative is drowning out the supercharger. Also I dont believe you will see gains. Judging from seat of the pants feel I felt it was actually slower. Could be a backpressure issue. Thanks for the feedback. Was everything back to normal when you switched back (felt normal power wise/could hear Blower again)? Link to comment Share on other sites More sharing options...
jo137649 Posted November 13, 2010 Author Report Share Posted November 13, 2010 Did any of you that did the delete conversion happen to youtube/video the before and after on the sound? If not that would be a great comparison point for us all. Link to comment Share on other sites More sharing options...
robertlane Posted November 13, 2010 Report Share Posted November 13, 2010 MRT is run by Scott Hoag, former Mustang engineer for a long time. His group was responsible for many of the performance Mustang models over the years. Link to comment Share on other sites More sharing options...
jmn444 Posted November 13, 2010 Report Share Posted November 13, 2010 Did any of you that did the delete conversion happen to youtube/video the before and after on the sound? If not that would be a great comparison point for us all. here's my post w/ video links on the pypebombs... pype bombs Link to comment Share on other sites More sharing options...
2010KonaBlueGT Posted November 14, 2010 Report Share Posted November 14, 2010 MRT is run by Scott Hoag, former Mustang engineer for a long time. His group was responsible for many of the performance Mustang models over the years. Although my Dad had a '65 Mustang I used to sneak out all the time, I'm new to the Mustang family so any of the "well known" names in the Mustang circles are new to me. Jack Roush however, is a name I'm very familiar with (having been involved in the NASCAR BGN, CTS & WC racing circle for a bit). I think Roush makes some of the nicest stuff out there and if like I suspect, those pipes are the same ones Roush uses on his 427R's....they're GREAT products. Having said that...I've never seen the Shelby offerings and I have seen the Roush offerings so my guess is just that...a WAG. Phill Link to comment Share on other sites More sharing options...
CrzyHorse Posted November 15, 2010 Report Share Posted November 15, 2010 Did any of you that did the delete conversion happen to youtube/video the before and after on the sound? If not that would be a great comparison point for us all. yes everything returned back to normal once they were back on. Link to comment Share on other sites More sharing options...
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