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6–71 Pro–Street Supercharger Kit Part #7488

Suggested Retail: $4,028.95
Your Price: $3,625.95
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Big Block Chevrolet – 6–71 Series

6-71 Pro-Street Supercharger Kit

PART #: 7488

UPC #: 090127534601

Emission Control Number 3

Weiand's 6–71 blower kits are equipped with exclusive two lobe rotors for maximum boost at lower RPMs and feature all new construction including the rotors, case, end–plates, Manifold and snout. Billet belt tensioner components and V–belt pulleys round out the package to give you everything necessary for installation on your boat. Kits are engineered to produce 10–12 lbs of boost on small blocks and 5–7 lbs of boost on big blocks but are a simple Pulley change away from pump gas or hard core racing.

All 6–71 marine kits are equipped with the extra tough 8mm (two piece billet snout) belt systems for durability while on the street or water.

All Superchargers are built in Weiand's state–of–the–art manufacturing cell and each Supercharger is 100% boost tested to help you squeeze out maximum power & efficiency.
Chevy Big Block (NOT compatible w/ Mercruiser, OMC or Volvo Penta accessory drives and requires short water pump and 2 "V" pulley) Long Nose, 3" Gilmer Drive Belt, Satin Finish

Installation Notes
Will not work with Gen VI engines. Weiand does not recommend using a Supercharger with a Gilmer-toothed belt and pop-off valve in an enclosed engine compartment. There is a high risk of explosion in the event of a backfire. 6-71 Superchargers are perfectly suited for engines with 7.5:1 to 8:1 compression ratios but may require race gas unless Pulley ratios are altered to reduce effective compression ratio below 12:1. Weiand recommends that all kits use double keyed crankshaft and double keyed, steel, SFI approved balancer. Kits include manifold, blower assembly, drive snout, pulleys, belt and hardware. Will not fit 8.1L (496 cu in) or 7.4L Vortec big blocks. Big Block kits fit standard deck motors only. Spacers are available for tall deck engines. Due to the wide variety of installation possibilities, it may be necessary to consult with a Weiand Supercharger Technical Rep at 270-781-9741 for assistance in selecting the proper kit for your application.

  • Long Nose
  • 3" Gilmer Drive Belt
  • 8.5% Underdriven Drive Ratio w/ Included Pulley Set
  • Satin Finish
  • Develop 550+ Horsepower out of a mild 454 Chevy
  • Instant, full-time power every time you hit the throttle
  • Substantially increases torque for heavy boats and pulling up skiers
  • Various kits also available to suit most marinized engines

Shipping Dimensions
L 25.000 in. x W 21.750 in. x H 24.000 in.
Weight 150.000 lb.

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