He put down 452RWHP on a Mustang dyno but the driver couldn't launch worth shit back then from what I hear. I'm not sure what he had back then but his mods as of now are ...

Steeda CAI Kit
Steeda Tri-Ax for T-56
MGW Adjustable Handle
Bassani X-Pipe w/ Hi-Flow Cats
Bassani Cat-Back
Front Tires: BFG KDWS (275/40)
Rear Tires: Eagle F1 GS-D3 (285/40)
NGK TR6 Plugs gapped @ .035
WOT Boost Bypass Valve Mod
Powerstat 160* Thermostat
Amazon Racing 2.93" Upper Pulley
Metco 100mm Idler
Gates 74.5" Belt
Diablo Delta Chip
MM Polyurethane Bushings
Kenny Brown IRS Brace
Autometer Lunar Gauges (Boost/A:F/Water Temp)
Autometer 3-Gauge A-Pillar Pod