i have a thp kit. i had some kinks to work through in the front end of the project, but jim was always there to support me time and again. just be sure you inquire about a turbo support bracket, and get a midpipe bracket fabbed up.
my car is an 08, and while the kit had provisions for a hook bracket at the midpipe, my 08 wasnt supported with one. not a big deal. the kit fit MUCH better once i got that bracketry in place.
mild steel vs stainless is all up to user preference. mild steel is more forgiving to the heat cycles of the motor/turbo set up. its also a lot easier to repair than stainless from my research. stainless wont corrode, but if its a cheap grade of stainless it is brittle and will not hold up to the test of time of the heat cycles. again, this is based off research/conclusions ive drawn.
ive had the THP kit on the car for 1 1/2 seasons, and and about 7,000 miles +/-. the power is great. heres my initial dynograph
http://imageshack.us/f/252/mattkahn.jpg/ (click on the graph from the link to explode it)the car had about 6000ish miles on it iirc, thp kit with the 61, 60 lbs injectors, twin gt supercar pumps, upgraded fmic, stock mufflers/manifolds, pulies, it still had the intake butterfly plates, and 3.73s on that setup i ran somewhere around low 13s at 119 im no john force haha.
between this year and last, i had 3.31s put in, cmdp, frpp plugs, dynomax 3 in exhaust, (misc stuff;stefs breather catch can, spec 3+ clutch, turbo blanket) and it netted me 467/464 on a different dyno tuned but by the same guy (mike post of dynotune mp).again, im not a track junkie but it ran a 12.70ish at 121 mph still on 8 lbs.
the only things i dont like about the kit; there are a lot of tight fitting spots. im not willing to give up my a/c, and im not looking to relocate the battery anytime soon. the oil filter, and powersteering have been relocated/the kit came with provisions for that. the biggest thing i dislike about the kit is how the turbo is incredibly close to the drivers side cam sensor. i really should wrap it lol but that wont take much time at all once i get around to it. i think with the addition of a tubular k, and wrapping the sensor itll be even more reliable.
im satisfied with the kit, if any part of the kit rots out, im sure ill keep the same design and have a pipe fabbed up in a quality SS. jims kit performs, fairly priced, and his customer service is unsurpassed.
