I have the FM 40 with dual outlets on my truck. I ran 3 mph faster than another titan at the track who had a magnaflow, we both had aem intakes other than that. My muffler was on the truck when i bought it so idk from experience the difference it makes or if his truck is just slower for some other reason.
Flowmasters
Im getting a new 50 delta flowmaster with dual pipes coming out behind rear wheels. Any opinions?
ThankS Roger
ThankS Roger
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