Compression Ignition Addict
Join Date: Nov 2008
Location: Kingwood, TX
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Hey all, ok i know i've been asking a ton of questions, but so far everyone has been a great help. this is my last one for a bit.
The stock exhaust is 3.5" i'm looking for an exhaust for better MPG. I was looking at the 5" exhaust(for sound and mpg's) but i've been told i dont need it til 500hp, which i'm not going after for a while(at least till warranty is up). So then i started looking at 4" exhaust. I know i need the stock cat to keep my warranty. so a 4" turbo back MBRP with keeping the stock cat is $380.
my question is this. Instead of paying close to $400 for exhaust. Can i gut the cat to keep the Cat appearance, and replace the muffler with a straight through muffler since the stock pipe is only .5" less than the 4" aftermarket and get almost the same MPG's?
i don't see how .5" is going to be that big of a deal, but i could be wrong. thanks,
'01 BMW ///M3 - New Toy
'07 F-250 PowerStroke - 5" MBRP Straight Pipe, Edge Insight, Eric Tuned SCT, HID's, 2.5" Newton Lift w/ 4" rear block and Icon Caster Sleeves, Bilstein 5100's, 18" XD Monster's w/35" Toyo M/T.
'17 Chevy Malibu - DD and Company Vehicle