Join Date: Feb 2009
Location: North of Dallas
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If you are concerned about maintaining exhaust velocity (the real aspect at work to that whole "backpressure" element), what you do is keep your stock pipe size, but you can up-size your muffler (an SRT8 component, for example). Naturally, you will need adapter couplers to connect from your stock pipe size to a muffler with larger core pipe size, but that's how you do it. The pipe size is nearly never the bottleneck unless you are dealing with tiny 1.5" size or something. It's the muffler that is the bottleneck (where sound attenuation is typically at direct odds for maximum flow that muffler could accommodate).
09 Challenger R/T automatic...4 tires, stick-on convex mirror, seats
I may not use the full 370 hp that often, but bolting out of the gate with a ready 170 hp and the roar of a v8 definitely puts a smile on my face day after day, mile after mile. It's not such a big number, rather how soon that number emerges.
v8 is #winning
v8 is America