Just a correcting on the above post it made 351rwkw not 361rwkw(typo)Not many mods mate its all in the tuning I spent alot of time on a mates dyno getting the tune right. I have Crow Valve springs, DEKAs, Wog Cooler, UBP, Surge tank. Still using the standard Xover pipe and airbox as well. Made that on 18psi but the auto died yet again. I just bought a 4" dump pipe high 5"flow cat which im going to high flow myself with a 3.5 inch adapter which will bolt to the factory system all in mild steel for $650!! brand new. This will get rid of all the restriction. If your interested Ill take pictures and post them.