Dropping the car off at Magnaflow next Monday
Senior Member
Joined: 04-03-2008
Posts: 1,434
From: A state of L N F Performance
Okay so Magnaflow DP would be one cat?
Also 20whp gain with 2.5 turboback is what you are saying, correct?
If so, that would put an HHR SS with a Hahn tune and a turbo back around 300 WHP.
Also 20whp gain with 2.5 turboback is what you are saying, correct?
If so, that would put an HHR SS with a Hahn tune and a turbo back around 300 WHP.
Thread Starter
Senior Member
Joined: 06-26-2008
Posts: 164
From: Corona CA
Also I thought I heard the stock DP had a rather restrictive bottleneck near the turbo, could be wrong.
I know a non catted DP will throw codes I never asked for a non catted DP, a catted DP that flows better would be just fine. Does the stock system just have just one cat?
I know a non catted DP will throw codes I never asked for a non catted DP, a catted DP that flows better would be just fine. Does the stock system just have just one cat?
I don't tink the DP is that big of a bottleneck. It's actually fairly straight with a coupld crushes around the cats. (pretty decent for a stock part)
Most of the magnaflow down pipe hp will come from cats that flow more. A non catted DP will make more power but be very loud. (I won't do this in CA
)
Thread Starter
Senior Member
Joined: 06-26-2008
Posts: 164
From: Corona CA
On my bone stock car it made 15 peak and 20+ under the curve at the wheels.
All cars are different but I would imagine you could be close to 300-310whp with exhaust/DP and tune.
Senior Member
Joined: 04-03-2008
Posts: 1,434
From: A state of L N F Performance
3" okay, that's better. 300-310whp would be a good number! No one, and I mean no one would expect that out of an HHR haha.
LOL
Thread Starter
Senior Member
Joined: 06-26-2008
Posts: 164
From: Corona CA
