weak stock T45 with a heavy duty Tremec 3550 or 3550TKO. Direct Bolt-On To Be ... Used with Any Tremec 3550 Transmission Fits All 4.6 GT and ... . H-Beam Rods, ARP Fasteners Forged Pistons (Your Choice Compression) Zero ... Above with Ross Racing Forged Pistons)................. ......from 2699.99 ... with Forged Crank and Ross Racing Pistons) Can Handle 600-700 hp ............. ... from 3549.99 With Probe Pistons.................. .from 3349.99 For more info please call ...