Muffler replacement huge horsepower gains!

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#10 (permalink)

04-14-2009, 11:08 AM

dont

CC Member

Join Date: Nov 2007

Location: Houston, Tx.

Cobra Make, Engine: SPF #1235

Posts: 170

Not Ranked

I changed out my stock 2.5" ID mufflers to 3" ID Cobra packs and picked up 16 HP and TQ on a chassy dyno. For the transition I expanded the 3" tails that come out of the Cobra packs to a tight slip fit into my existing 3.5" pipes. I have the fluttering when I push in the clutch coming to a stop. There are pics in my gallery of the process.

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Superformance #1235
460/T5

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