^Honestly, it could either way. I have the HKS 3" Hi-power cat back and my numbers actually went up. I'd be willing to buy this midpipe, especially since I want to start adding more 2-stroke.
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04 TiGray RX8 MT, LS2 coil setup, 3" midpipe, HKS Hi-power 3" exhaust, TEIN S-Techs, Hotchkis Adj F/R sways, K&N Typhoon V2, Steel braided brake lines, Redline drivetrain fluids, ATE Super Blue brake fluid, Cobalt XR2/GTS brake combo, MB Motorpsorts Weapons 18x9 +45 offset, 275/35's
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