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Old 06-05-2009, 01:54 PM   #11 (permalink)
Josh@STILLEN
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Join Date: Dec 2008
Location: Costa Mesa, CA
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Drives: 2004 G35 Coupe 6MT
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Quote:
Originally Posted by FricFrac View Post
I've got my Stillen Cat back, high flow cat and G3 intake on order however I do have a question about the cat back exhaust. I know Stillen puts a lot of research into their products but the cat back exhaust is about 40 lbs heavier than stock. Isn't that the equivalent of loosing around 4 hp from the additional weight? So while the gain on the dyno is around 18 hp the net effect is about 14 hp? I guess the good part of the weight gain is that its below the COG....
As posted in another thread, I apologize FricFrac that you got some incorrect information regarding the STILLEN cat-back exhaust. Here's the weights of both systems.

Stock Exhaust

Muffler Section - 26.8lbs (highly inefficient)
Y-Pipe - 11.6lbs
Resonated Y-Pipe - 15.6lbs
Total: 54.0lbs

STILLEN Exhaust

Muffler Section - 39.6lbs (proven huge hp gains)
Y-Pipe - 11.3lbs
Resonated Y-Pipe - 14.4lbs
Total: 65.3lbs

Difference: +11.3lbs and 18whp

Also note that the weight is at the lowest point of the car, over the rear wheels, which will increase traction.
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