GT45 T4 Twin Turbo Kit — Chevy Big Block
A complete twin turbo package for big block Chevy engines, built around (2) GT45 T4 turbochargers. With supporting modifications and a built motor, this setup is capable of significant horsepower gains over stock. Includes a cooling solution for a hot turbocharged engine and an electronic turbo timer to ensure a proper cool-down.
Fits:
- Chevy big block (BBC) 396, 427, 454, 502, and 572
What's included:
- (2) GT45 T4 Turbochargers — T4 exhaust inlet flange, 4" inlet/2.5" outlet, 98mm compressor exducer, 107mm compressor air inlet, 88mm turbine inducer, 1.05 A/R, oil-cooled, 1/8 NPT oil inlet
- (2) Stainless Steel Turbo Manifolds — TIG-welded 321 stainless steel, large 2.25" primaries, extra-thick flanges, gaskets and collector bolts included
- Front Mount Intercooler — lightweight aluminum, TIG-welded
- Manual Boost Controller Kit — anodized aluminum, CNC machined, adjustable, with install kit
- Aluminum Intercooler Piping Kit — aluminum piping, silicone couplers, and stainless worm-gear clamps (may require light modification to fit)
- (2) Turbo Oiling Kits — oil feed and return lines, fittings, and hardware
- Battery Relocation Kit — full aluminum construction with relocation cables, straps, and hardware
- Slimline Cooling Fan — reversible push/pull design
- Electronic Turbo Timer — LED digital display, pigtail wiring included
- Fuel Pressure Regulator and Filter Kit — adjustable regulator with pressure gauge and 6AN billet aluminum inline filter
- Oil Catch Can — polished finish, complete install kit
- Blow-Off Valve Kit — complete install kit included
- Heat Wrap — 50ft roll, 1" wide
- (2) Stainless DIY Downpipe Kits — 2.5" mandrel bent stainless piping, O2 sensor bung pre-installed
- Coolant Bung — aluminum, fits most OEM 38mm coolant hoses
- 2x Adapters — stainless steel T4-to-3" adapters, plus 3"-to-4" adapters
Installation requires mechanical experience; some fabrication or modification may be needed for a proper fit. Always verify local emissions regulations before installing forced-induction components on a vehicle used on public roads.