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Suggested Retail: $4,281.95
Your Price: $3,852.95

Big Block Chevrolet – 8–71 Series

8-71 Pro-Street Supercharger Kit

PART #: 7186P

UPC #: 032474718617

Emission Control Number 3

If it's maximum power you are looking for, check out the 8–71 series! Built utilizing all new cases, end–plates, Manifold and snout and reconditioned GM 3 lobe rotors for peak performance under demanding, high RPM conditions. 8–71s are engineered to produce 10–12 lbs of boost on small blocks and 5–7 lbs on big blocks (depending on application and engine efficiency). These Superchargers are for the hard core enthusiast!

All 8–71 marine kits are equipped with the extra tough 8mm (two piece billet snout) belt systems for durability while on the street or water. They will accommodate 2 “V” belt pulleys. All kits can be used with some marinized engine accessories, but may require extensive modifications to bracketry or mounting locations.

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 Long Nose, 3" Gilmer Drive Belt, Polished 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. 8-71 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
  • 11.5% Underdriven Drive Ratio w/ Included Pulley Set
  • Polished 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

Parts & Kits for 7186P
7070 Idler Pulley Bracket

Shipping Dimensions
L 25.250 in. x W 22.500 in. x H 25.000 in.
Weight 143.000 lb.

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