I've seen a 2,700.00 muffler reduce output over a stock arrangement by over 25HP on a stock 3.2 engine.
My experience with most aftermarket equipment for these engines has been very unfavorable.. It seems that too many things are developed for sound or visual appeal.
To get 30HP I have to increase displacement or add my cams and head work... Then i still use a stock muffler!
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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