well i have stage 2 with k&n cold air intake 3in downpip and new header no idea what i am running but i wanna run like 350whp i was thinking about stage 3 can people help me out and i dont wanna put stuff to hurt the car neither and nothing like a gran part just simple stuff 300-400 here n there this is the stage 3
Includes:
ZZP PCM
ZZP modular pulley system
GM serpentine belt or oversized tensioner pulley (see product page for OS tensioner instructions)
Plug and play injector harness
NGK 4644 spark plugs gapped at .035
60# fuel injectors
ZZP Heat Exchanger (comes with 6 feet of hose, fittings, & mounting hardware)
*PCM portion of this kit is non-returnable. Pulley puller tool required for changing blower pulley.

Dyno chart on upper right shows power increase from 214 to 249WHP on a stock Cobalt using a 2.8" pulley. With exhaust work expect 260WHP or higher.

2.9" recommended for users with less than 93 octane, totally stock vehicles other than this kit, and/or people wanting to stay a little more conservative.
2.8" pulley We recommend a dual pass endplate and 93 octane.
2.7" pulley requires an exhaust header and a dual pass intercooler plate.

 

If u wanna run around 300hp your goin to need to look into thats setup with E-85. If u want 350 or higher get a TVS or go TURBO

 

You won't see 300 whp on a stock blower easily, or with that ZZP kit. I have that kit on my car and have not dyno'd but would guess 265ish whp. i also have a bad-mab header and ZZP DP too. The simple bolt on 350 to 400 whp is a ZZP turbo swap. it takes a lot more work, time, and money to get a s/c car to 350 whp. E-85 is your friend here lol

 

if you wana 350 on the m62 your gonna need E85 60lb injectors 2,8 pulley stage 2 cams with lifters and retainers...and a agressive tune and you should be close...

 

Not even close, even with cams you will be lucky to break 300. 60's ARE NOT GOING TO WORK ON E-85. You have to have ATLEAST 80's, and if it's an 05 a Fuel pump. Ebristol made 303whp on an m62 and E-85 with a 2.7, the ONLY M62 to date that have posted a dyno sheet to prove it with a stock longblock.