Finished the build and got dyno tuned @ TTP this past week. I have the QTP downpipe and stock cat and catback. As you can see from the graph it's about a 34- 38 hp difference when the downpipe is open vs. it being closed also the boost will jump up about 3 psi. I am really impressed. Not to mention, the car just sounds wicked with it open-- just don't drive through you neighborhood that way your neighbors will hate you.

 

do you have to have a seperate map/tune for when the cut out is open vs closed?

 

I just picked one up off ebay...

I like the piece A LOT!

I have a bone stock car and am slowly getting the parts together for a light mod.

Next is a TRU BOOST.

Lastly is a trip over to AMS for a tune....

I'm really hoping to run close to the LSX Camaro I sold to get more doors for the kids.
It made 392 whp and went 12.70@ 114 on all- season radials (6 speed)

 

No, you get it tuned open.

 

What about you wideband sensor when its open? how can you tell you AFR when its open?

 

You get the wideband installed between the j-pipe and the cutout.