40th GT said:Would one gain about 3-5hp from a Magnaflow catback?
What year is your car?mad4mods said:Stock 225 rwhp
After SLP longtubes, catted x-pipe, cat back, cai: 262 rwhp
diablo tune, u/d pulley: 281 rwhp
Best time before u/d & diablo: 13:5 @ 100 (3.73 gears)
That's what I thought too, that's why I asked what year. What do 99+ put to the wheels stock? I know pre 99+ (97-98 is like 197)Trublu01 said:No, the dude with the 280RWHP GT with exhaust, pullies and a chip!
about 220-228Blev said:That's what I thought too, that's why I asked what year. What do 99+ put to the wheels stock? I know pre 99+ (97-98 is like 197)
I put one of those Nos stickers on the back of my car and gained 27.4rwhp so 56 for just exhaust is very believable, i mean jeez, you guys are just so critical all the time!Trublu01 said:Reguardless he said his was 225. So he gained 56hp with full exhaust, pullies and a chip!![]()

Jackie Chan said:i think i'd rather have a little more mph than 100 instead of a 280rwhp dyno sheet
sorry all i have is timeslipsmad4mods said:It's a 2003.
The 13.5 @ 100 was BEFORE the u/d pullies & predator. So that was with 262 hp. I suspect I should be in the low 13's with a couple mph more now. You might want to pay attention a little more when you read the posts. Bone stock the car ran [email protected]
The numbers ARE real and are SAE from a superflow dyno. And all runs were done on the same dyno.
The break down was about 35 from the exhaust & cai, 8 from the pullies, and the rest from the diablo tune.
Believe what you want. I have the car, the dyno sheets and the timeslips.