The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Magnaflow XL mufflers

Norcal72 · 04-30-2014, 02:19 AM

Did you remove the exhaust manifolds? If you did, did you check the gasket for port matching? Maybe partial blocked ports? Just throwing out ideas, not being a SA.

That 350 should love the 2.5" dual pipes. Should of definately gained some horse power. Hows the power after 2500 rpms? Should of at least gained some top end power.

I wouldn't put a choke in the exhaust by going from 2.5" to 2.25".

04-30-2014, 02:19 AM	#8
Norcal72 Registered User Join Date: Apr 2014 Location: CA Posts: 27	Re: Magnaflow XL mufflers - yay or nay? Did you remove the exhaust manifolds? If you did, did you check the gasket for port matching? Maybe partial blocked ports? Just throwing out ideas, not being a SA. That 350 should love the 2.5" dual pipes. Should of definately gained some horse power. Hows the power after 2500 rpms? Should of at least gained some top end power. I wouldn't put a choke in the exhaust by going from 2.5" to 2.25".