QTP Low Profile Cutouts questions
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QTP Low Profile Cutouts questions
Ive been looking into getting a set of the QTP Low Profile cutouts but had a couple questions. Ive seen on here that people have had rear leaf spring failures related to heat being blown directly onto the rear leaf from the cutouts. Apparently they way to prevent this is to use a turn down to direct the heat away. The problem is the turn down that is available with the low profile kit doesnt look like much of a turn down. It looks like it is just a pipe cut at an angle that prevents the exhaust from going up towards the car. Has anybody installed a low profile on their car and do you have any suggestions on how to keep the heat off of the rear leaf spring? Or should I just get the old kit that comes with an actual turn down? Has anyone had issues installing a standard qtp cutout kit on a c6? What vendor has the best price on the QTP sets. Best price Ive found id about $390 so far. What material is the stock axel back on the 2005 base model? So I can get an accurate quote from a welder/ exhaust shop.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
You're right the "turn downs" are just straight pipe cut at an angle. They could be modded to do so. Here's how I have mine:
Stock pipe is alumnize mild steel. Grind off the coating for best results although I have seen a good muffler shop weld right onto it. That price sounds about as good as it gets.
Stock pipe is alumnize mild steel. Grind off the coating for best results although I have seen a good muffler shop weld right onto it. That price sounds about as good as it gets.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
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From: St. Louis, MO
St. Jude Donor '08
I also have had the QTP's for 7+ years, they still work great...I use them just about every time I drive the car now. A car show favorite for sure.
Here are some pics of mine, it's important to direct the exhaust down, not at the spring. Those that direct the exhaust at the spring are the ones who had the problems. Guys like Marc and I have years and years of reliable service.
http://forums.corvetteforum.com/c6-t...-on-my-c6.html
Here are some pics of mine, it's important to direct the exhaust down, not at the spring. Those that direct the exhaust at the spring are the ones who had the problems. Guys like Marc and I have years and years of reliable service.
http://forums.corvetteforum.com/c6-t...-on-my-c6.html
Had QTP cutouts installed by Florida Performance in Fort Lauderdale. Overall very pleased with the job Rob, the shop owner, did. This was his first C6 and he found a great place to put them and made the custom mandrel bent Y-pipes to maximize flow from the cutouts. We found no way to put them right after the collectors but they fit well by the trans. I have the DTE brace too but it wasn't in the way.
Installed the wiring myself along the drivers side rocker panel, behind seat then out the wheel well under the carpet. Removed the rear inner fender and drilled a small hole in the wheel well then ran the wire down to the cutouts. Hardest part is finding a hot wire when the ignition is on on these C6's. I ended up tapping the seat heater fuse as others here have done.
They are loud and DEEP when open at idle. I've actually heard louder exhaust though, I was kind of surprised they are not louder. I think it is because of the turn downs and the fact that I have cats and the pipes are pretty long before the cutouts. On the track they have a nice race car sound - I'd say like Borla Stingers plus 25%. When you open them at a stoplight you will turn heads, that's for sure.
Overall happy with the mod, it gives me quiet during my morning drive but loud when I'm at the track which is what I wanted.
Here is a video of idle with cutouts open and closed. The gain on the mike makes the closed sound much louder than it is, it's really quiet with factory mufflers even with my cam.
Here are some pics:
Installed the wiring myself along the drivers side rocker panel, behind seat then out the wheel well under the carpet. Removed the rear inner fender and drilled a small hole in the wheel well then ran the wire down to the cutouts. Hardest part is finding a hot wire when the ignition is on on these C6's. I ended up tapping the seat heater fuse as others here have done.
They are loud and DEEP when open at idle. I've actually heard louder exhaust though, I was kind of surprised they are not louder. I think it is because of the turn downs and the fact that I have cats and the pipes are pretty long before the cutouts. On the track they have a nice race car sound - I'd say like Borla Stingers plus 25%. When you open them at a stoplight you will turn heads, that's for sure.
Overall happy with the mod, it gives me quiet during my morning drive but loud when I'm at the track which is what I wanted.
Here is a video of idle with cutouts open and closed. The gain on the mike makes the closed sound much louder than it is, it's really quiet with factory mufflers even with my cam.
Here are some pics:
