RE: Cutting the y-pipe for H-pipe duals. Affected Backpressure?
If you do that your gas mileage will be about 3-5 percent lower plus you'd lose some low end torque just like people who put 3 inch piping on 4 bangers do. backpressure is the cause
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06 GT Auto., Steeda CAI, SCT tune, Magnaflow catback, Roush 1/4 window louvers, Roush hood scoop, Bi-xenon HID's, 14" Baer front brakes, Hood pins, 275/40/18 on all 4 corners, FRPP handling pack, Steeda strut mounts/panhard bar, BMR lca's, shortened antenna, locking fuel door.
http://www.youtube.com/watch?v=Q7P8D3RT_Yg
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