You can get in the car, turn on accessory power, switch it to quiet and start it. It will stay that way till you switch drive modes or exhaust modes. I do it every time I start the car in the morning. (Not very often). And I can tell you with Kooks catless LTH , Magnaflow X and competition cat...
Probably too much power for stock. I have an 18 A10 w/ the QA1 cf shaft making 872whp and have no complaints whatsoever. I would check installation. If it looks good, try reclocking it 180 degrees
Not sure about the “limiter”. I witnessed a bone stock A10 18 on a dynojet make 404/376. Ran it all the way to 7500 in 7th. The car had a little less than 300 miles on it. Lol
Your numbers are close though. A little less HP and a little more torque
There are complete kits and tuner kits. For the best options for your particular application, call PBD, Beefcake or Lethal. They all offer packages from mild to wild. Enjoy
Yeah, I’ll was able to make 750 on 93 with a giant fuel system and 15psi of “efficient” boost. At 7100, timing went to 14 and power fell off a cliff. I have trouble believing 1000+
I am running Kooks 1 7/8 with Magnaflow X & competition cat back. 3” all the way through. Kooks offers 3” adapter pipes that I used with stainless ID couplers I bought off amazon. Not that tough. An exhaust shop could handle it easily. I’m sure it work with an H pipe the same way