Speedmaster PCE460.1028 Pontiac 326 400 455 Complete 6-71 Roots Supercharger Blower Kit

The Speedmaster PCE460.1028 is a complete 6-71 Roots-style supercharger blower kit engineered specifically for Pontiac 326, 400, and 455 V8 engines. This all-inclusive kit delivers serious forced induction capability straight out of the box, providing horsepower gains of 45–55% over a naturally aspirated baseline. The polished aluminum supercharger case pairs with a satin-finish intake manifold for a bold, purposeful engine bay appearance.

Supercharger Design:

• Polished aluminum supercharger case with precision-engineered, double-pinned 3-lobe rotors timed and clearanced from the factory
• Short-nose drive assembly with billet aluminum construction
• Heavy-duty front and rear bearing plates for long-term durability under demanding conditions
• Gilmer-style pulley drive system with 50-tooth and 55-tooth upper and lower supercharger drive pulleys
• Dual-groove crankshaft pulley configuration
• Intake manifold pop-off valve relocated to the rear for improved under-hood clearance
• Satin-finish intake manifold with polished adapter plate for dual 4-barrel carburetors

Kit Includes:

• 6-71 Roots-style supercharger (polished)
• Pontiac-specific satin intake manifold
• Supercharger snout with coupler
• Upper and lower supercharger drive pulleys (50T and 55T)
• 3-inch Gilmer-style drive belt
• Idler pulley with bracket assembly
• Dual-groove V-belt crank accessory pulley
• Belt tensioner assembly
• Supercharger-to-intake manifold gasket
• Carburetor plate gasket with screen mesh
• Breakaway stud kit and hardware

Key Specifications:

• Supercharger Model: 6-71
• Lobe Quantity: 3 (three-lobe rotor design)
• Supercharger Finish: Polished
• Intake Finish: Satin
• Pulley Style: Gilmer
• Pulley Teeth Count: 50/55
• Carburetor Quantity: Dual (two 4-barrel)
• Nose Style: Short
• Crankshaft Pulley Grooves: Dual
• Dampener: Not included
• Carburetor Linkage: Not included

Additional pulley combinations (48T, 60T, and 65T) are available separately from Speedmaster to increase or decrease the supercharger drive ratio. Note: Carburetors, carburetor linkage, and harmonic dampener are not included with this kit.