High flow cats, headers??
Are high flow cats available and is it a good idea to put headers, high flow cats and cat back system on, will you lose torque?
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1997 F150 SC, SB, 5.4, offroad, K & N, Westin Nerf bars, trudual exhaust with Super turbos, Power Slider, Power sunroof, bug shield, window visors, black outs, door edge moldings, black, grey, bench seat towing package etc.
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1997 F150 SC, SB, 5.4, offroad, K & N, Westin Nerf bars, trudual exhaust with Super turbos, Power Slider, Power sunroof, bug shield, window visors, black outs, door edge moldings, black, grey, bench seat towing package etc.


