[Bangkok_ZL1]

Originally Posted by zx9rmal

Just as an aside, what is the sound like with an otherwise stock exhaust?

Don’t know but I’m going to find out. 1 7/8 Streetfighter Headers from Down under and stock exhaust from the secondaries back. Maybe I’ll add that to my testing thread I’m doing.

[SHE'Z 18]

Originally Posted by ChadSZL1

I have long tube CSP headers and no cats with AWE system. It’s loud for sure but in the cabin it’s actually pretty quiet! Just cruising around it’s great. When you hammer down it does get loud but only outside! I might in the future and something to tone it down a bit!

Hey Chad,
What AWE system do you have (Catback/ axle back)? Touring mufflers? Resonators?

Thanks

[Chrome383Z]

Originally Posted by Cleancoupe

Ended up going with CSP headers with the GESI Gen II cats. Pricey for exhaust, but I guess it’s the market we are in these days. I should have ordered this stuff last year when I was looking into it haha

Good choice on the CSP headers and Gen II cats. That’s what I have. Fit was excellent. I went that route a year ago because I wanted CATs and figured I’d be going FI soon. Have a 2650 I’m working on installing now, so I hope they live up to the hype.

A few notes, use the GM exhaust bolts not the supplied hardware. In fact that was my only negative on the system. The hardware was kind of an afterthought. I just dropped the exhaust to put in a ZL1 fuel pump and all four supplied collector bolts twisted off. I’ll be going back with better bolts when I put it back together. But outside of that they are awesome.

[Camaro1973]

Originally Posted by Chrome383Z

Good choice on the CSP headers and Gen II cats. That’s what I have. Fit was excellent. I went that route a year ago because I wanted CATs and figured I’d be going FI soon. Have a 2650 I’m working on installing now, so I hope they live up to the hype.

A few notes, use the GM exhaust bolts not the supplied hardware. In fact that was my only negative on the system. The hardware was kind of an afterthought. I just dropped the exhaust to put in a ZL1 fuel pump and all four supplied collector bolts twisted off. I’ll be going back with better bolts when I put it back together. But outside of that they are awesome.

I’m pushing 850 through mine. Still ok almost a year later. Gen 1 not so much. I’ve got a box of blown out cats….. 3 sets total I went through.

[45LongColt]

I have Stainless Works 2”Long Tubes, Gen-2 UHO’s, 2” pipe and X to Borla Attak axle backs and I notice only a difference at WOT after adding the headers and Gen-2’s. When at idle, normal driving the system sounds the same as before adding the headers and CATs. However WOT, scary loud.