Has anyone installed one on there hhr ss yet? I like the cutout opt. myself.

 

I got both the DP and the 3" back.

$ for $ its pricey but the second best HP bolt-on, for the SS. (somewhere around 20HP)

HAHN's DP doesn't throw codes either, although to get the most out of it, you need to re-tune, especially if you add the cut-out. The Comp doesn't like a cut-out, or non-catted.

HAHN's 3" back comes with some T-Bolts, so you can drop the resonator section of pipe for the track, in less than five minutes.

We love it, just pray Florida doesn't start testing.

 

If Florida does start testing(which is not anytime soon) I would just get the cat opt. That's why I like it, just seeing if anyone installed one.

 

I have had the 3" Hahn downpipe (with hi flow cat) for over 6 months now- I actually had to take if off the first week because the power increase caused my stock clutch to start slipping when the boost got over 20 psi. I finally installed a Kentucky clutch and re-installed the downpipe. This is definetly a worthwile mod as it adds quite a bit of power although it will spin my conti extreme DW tires through 2nd gear now. This down pipe adds more exhaust sound too- I would say perfect as any more would be irritating cruising on the freeway. I really don't think replacing the muffler is necessary- you can see right thru it anyways.OH, and it has never tripped any check engine codes either.

 

Where is it for sale at?

 

Here you go:
http://www.turbosystem.com/ProjectVe...%20MODpipe.htm

Ill be getting this hopefully soon then a e85 tune.

 

The Cobalt one is a direct hookup?

 

NO. and make sure you order either a 5sp or auto version. The auto is about an 1" or so longer. If you buy from Aubry or Bill, and want a cut-out have them ship it with one.

 

Has it effected you MPG at all?