2012 ZL1 Exhaust on a 2011 1SS

[Tapia5Gen]

Does anyone know if I can swamp out my current stock exhaust for a 2012 stock Exhaust and still pass smog here in California?

[thegreatwhite]

if you put an exhaust system on your car that is completely the same as a completely stock 2012 SS then theres no reason it shouldnt pass smog in any state.

[thegreatwhite]

but california will find a way to fine you so watch out

[Spec]

Shorties - OK

Long Tubes - NOT OK, you will not pass because you have to remove the stock cats and that is a no-no in CA. You will fail the visual inspection.

If you add shorties, you don't have to touch the cats, and most shorties are CARB legal, you'll be fine.

As for the catback, you can do whatever you want after the cats - even go straight pipe. Should pass smog as long as you're not popping codes.

[Tapia5Gen]

thank you TheGreatWhite, and Spec for that info. yeah the ZL1 is coming off my brothers 2012 ZL1.

[Tapia5Gen]

*ZL1 Exhaust system

[thegreatwhite]

the stock ZL1 pipes an cats should be legal. if it were my car i would find out which high-flow cats were CA legal cause a boosted car can have big power benefits to no or high flow cats. i think solo and or JBA make CA legal high flow cats

[Tapia5Gen]

Originally Posted by thegreatwhite

the stock ZL1 pipes an cats should be legal. if it were my car i would find out which high-flow cats were CA legal cause a boosted car can have big power benefits to no or high flow cats. i think solo and or JBA make CA legal high flow cats

I didn't not know that, thanks TheGreatWhite! time to do some research.

[Sales@Phastek]

Originally Posted by thegreatwhite

i think solo and or JBA make CA legal high flow cats

Originally Posted by Tapia5Gen

I didn't not know that, thanks TheGreatWhite! time to do some research.

Just a heads up guys, JBA and Solo do NOT have high flow cats that are CA legal. JBA and ARH have shorty headers that are CA legal but no high flow cats.

Thank you,
Ricardo

[Tapia5Gen]

Originally Posted by Sales@Phastek

Just a heads up guys, JBA and Solo do NOT have high flow cats that are CA legal. JBA and ARH have shorty headers that are CA legal but no high flow cats.

Thank you,
Ricardo

what would you recommend?

[DOC52]

If you want to stay legal just do the cat-back. If you want headers, smog then put longtubes on after. Shorties do gain a little hp, but for the money and install you're going to end up wishing you did longtube headers, unless you're planning to turbo your car down the road.

[Spec]

Originally Posted by DOC52

If you want to stay legal just do the cat-back. If you want headers, smog then put longtubes on after. Shorties do gain a little hp, but for the money and install you're going to end up wishing you did longtube headers, unless you're planning to turbo your car down the road.

Shorties net about the same as long tubes when you change out the cats. With Long Tubes, you either have to go catless straight pipe or hfc's. The cats is where 90 percent of the restriction is.

When you go shorties and don't do cats, the gain is minimal for sure. When you do shorties and hfc's, you're up there with lt's...

[Tapia5Gen]

Originally Posted by Spec

Shorties net about the same as long tubes when you change out the cats. With Long Tubes, you either have to go catless straight pipe or hfc's. The cats is where 90 percent of the restriction is.

When you go shorties and don't do cats, the gain is minimal for sure. When you do shorties and hfc's, you're up there with lt's...

Wow! man this is all good info. i am finally getting around to adding mods to my car. i am looking into adding the ZL1 front and rear bumper along with the rockers.