Help with Bolt-On Mods
Thread Starter
Cruising
Joined: Jun 2006
Posts: 11
Likes: 0
From: Gilroy CA
Help with Bolt-On Mods
Hello,
I have a stock C6 (LS2) and am thinking about some basic mods to give it a little boost (i.e. more hp in the 0-100mph range). From related threds, it seems like an air intake upgrade and headers are the best bet, but I sure would appreciate your input on recommendations, brands, etc.
Note that I live in California, so I'm not sure if headers will pass smog. Any insights on this are definitely appreciated.
I have a stock C6 (LS2) and am thinking about some basic mods to give it a little boost (i.e. more hp in the 0-100mph range). From related threds, it seems like an air intake upgrade and headers are the best bet, but I sure would appreciate your input on recommendations, brands, etc.
Note that I live in California, so I'm not sure if headers will pass smog. Any insights on this are definitely appreciated.
Le Mans Master
Joined: Nov 2003
Posts: 8,308
Likes: 157
From: NJ
Hello,
I have a stock C6 (LS2) and am thinking about some basic mods to give it a little boost (i.e. more hp in the 0-100mph range). From related threds, it seems like an air intake upgrade and headers are the best bet, but I sure would appreciate your input on recommendations, brands, etc.
Note that I live in California, so I'm not sure if headers will pass smog. Any insights on this are definitely appreciated.
I have a stock C6 (LS2) and am thinking about some basic mods to give it a little boost (i.e. more hp in the 0-100mph range). From related threds, it seems like an air intake upgrade and headers are the best bet, but I sure would appreciate your input on recommendations, brands, etc.
Note that I live in California, so I'm not sure if headers will pass smog. Any insights on this are definitely appreciated.
Then tune it to perfection and you should be good to go.
I would also invest in a good set of road race tires, like the nitto r2 tires at some point.
Goodluck with your car.
Last edited by robz; Jun 3, 2008 at 05:27 PM.
Le Mans Master
Joined: Jun 2007
Posts: 7,610
Likes: 12
As stated, that's false. If the tuner knows what he's doing, headers w/ cats will pass sniffer and basic smog test for the biannual certification. California Vette owners I've talked with all pass w/ headers.
What headers/cats will not pass in California is an under-the-car visual inspection for modified emissions control equipment, but this visual test is only warranted if other factors draw suspicion and some plain 'ol bad luck mixed in.
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Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Gears are the most noticable mod for SOTP difference. You feel like the car lost 500 lbs. No warranty or emission issues either. Satisfied my mod bug for almost a whole year! 
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Get 4.10's unless you have severe OCD or plan on more mods to the point you will need higher than a 128 trap speed and then get 3.90's.EDIT: If you have an A6 get 3.42's. I've tuned a bunch with 3.15's and 3.42's and the hands down winner is 3.42's.
Last edited by SpinMonster; Jun 4, 2008 at 07:31 AM.
Instructor
Joined: Dec 2007
Posts: 227
Likes: 0
Options
- Vararam air intake (`40hp).
- Borla X-pipe (`10hp).
- Borla Stingers Aggressive muffler (`10hp).
- Predator Tune (`20hp).
Easy, bolt ons, least warranty risk, easy on wallet, enough for day-to-day.
Otherwise,
- ProCharger supercharger (`200hp).
- Kooks headers/x-pipe (`40hp).
- Borla Stingers Aggressive muffler (`10hp).
- Tune (`20-30hp).
Complex, professional installation, higher warranty risk, expensive, enough to match ZR1/track.
Good Luck
- Borla X-pipe (`10hp).
- Borla Stingers Aggressive muffler (`10hp).
- Predator Tune (`20hp).
Easy, bolt ons, least warranty risk, easy on wallet, enough for day-to-day.
Otherwise,
- ProCharger supercharger (`200hp).
- Kooks headers/x-pipe (`40hp).
- Borla Stingers Aggressive muffler (`10hp).
- Tune (`20-30hp).
Complex, professional installation, higher warranty risk, expensive, enough to match ZR1/track.
Good Luck
Last edited by obaidan; Jun 6, 2008 at 08:40 PM.
Thread Starter
Cruising
Joined: Jun 2006
Posts: 11
Likes: 0
From: Gilroy CA
As stated, that's false. If the tuner knows what he's doing, headers w/ cats will pass sniffer and basic smog test for the biannual certification. California Vette owners I've talked with all pass w/ headers.
What headers/cats will not pass in California is an under-the-car visual inspection for modified emissions control equipment, but this visual test is only warranted if other factors draw suspicion and some plain 'ol bad luck mixed in.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Under normal conditions you can pass the test. Very few testing stations get **** about bolt ons. My son's 2002 C5 has my modded LS2
motor in the car. It makes 461rwhp, with all the bolt ons plus 215 ET heads, a 224/228/581/588/114 cam and it passed the sniffer and passed smog. The testing station could have cared less about the visual. So there you go. He had no problems.
motor in the car. It makes 461rwhp, with all the bolt ons plus 215 ET heads, a 224/228/581/588/114 cam and it passed the sniffer and passed smog. The testing station could have cared less about the visual. So there you go. He had no problems.