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Scat Stroker Series 9000 331 ci Street-Strip Rotating Assembly (79-95 5.0L)

Market Price $1,059.99 You Save 9% ($98.00)

$961.99 (kit)

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  • Item 100531
  • MPN# 1-94055

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Features & Details

  • Scat Series 9000 Street-Strip Rotating Assembly
  • Punch Out Your 302ci to a 331ci for More Power
  • Includes Cast Crankshaft, I-Beam Connecting Rods, and Forged Flat Top Pistons
  • 4.030" Bore
  • 3.250" Crank Stroke
  • 5.400" Rod Length
  • Compression Ratio 10.4:1 W/58cc; 9.7:1 W/64cc; 8.9:1 W/70cc
  • Unbalanced Kit - Use 28oz Balancer & 28oz Flywheel/Flexplate
  • Fits 1979 to 1995 5.0L Mustangs
Stroker Kit. There is no replacement for displacement, so punch out your 302 V8 to a more respectable 331 for more asphalt-chewing horsepower with a Scat Stroker Series 9000 Street-Strip Rotating Assembly.

Kit Includes. Maximize the displacement of your engine with a cubic inch-enhancing stroker kit that includes a 9000 Series cast crankshaft, Pro Stock I-beam connecting rods with ARP 8740 3/8" cap screw bolts, forged flat top pistons as well as rings and main & rod bearings.

Compression Ratio. The Scat Stroker Kit will allow for different compression ratios depending on the heads installed. Examples: 10.4:1 with 58cc heads; 9.7:1 with 64cc heads; 8.9:1 with 70cc heads.

Unbalanced Kit. This Rotating Assembly comes unbalanced and will need to be professionally balanced before installation. It requires the use of a 28 oz harmonic balancer as well as a matching 28 oz flywheel or flexplate.

Application. This Scat Stroker Series 9000 331ci Street-Strip Rotating Assembly Kit is designed to fit 1979 to 1995 Mustangs equipped with the iconic pushrod 5.0L engine including the 5.0 LX, GT and SVT Cobra models.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 Details

What's in the Box
  • (1) Crankshaft
  • (8) Connecting Rods
  • (8) Pistons
  • Rings
  • Bearings
Installation Info
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Cobra - 93, 94, 95
  • GT - 94, 95

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4 Questions / 4 Answers

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What do i need in terms of a balancer/flywheel I understand that this kit is set up for 28oz balance. I am assuming i need a 28oz balancer but what do i do for a flywheel?


  • It requires a machined flywheel to 28oz, it says right in the description


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Will this clear the oil pan Will this clear the factory oil pan on 89 5.0 ho


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Can you please provide details of piston; maker, CC, Compression Height, etc. Thans


  • The Scat Stroker Series 9000 331 ci Street-Strip Rotating Assembly has the follow dimensions: Stroke of 3.250" Length of 5.400" Manufacture is Icon Class: Forged Bore: 4.03 Type: Flat CC: -11cc Crank: Scat Series 9000 Cast Pro Comp Stroker Lightweight Crankshafts Item # 9-302-3250-5400-2123 Crankshaft Material: Cast steel Engine Balance: External, 28 oz. imbalance Lightened: No Requires Narrow Bearings: No Rod Bearings Included: No Main Bearings Included: No Rod Journal Diameter (in): 2.123 in. Rod: Scat Pro Stock I-Beam Connecting Rods Item # 2-ICR5400-927 Connecting Rod Material: Forged 4340 steel Connecting Rod Finish: Polished and shot-peened Wrist Pin Style: Floating Clearanced for Stroker: Yes Cap Retention Style: Cap screw Connecting Rod Bolt Brand: ARP Connecting Rod Bolt Diameter: 3/8 in. Connecting Rod Bolt Material: 8740 chromoly steel Fastener Yield Strength (psi): 200,000 psi Connecting Rod Bolt Head Style: 12-point Big End Bore Diameter (in): 2.1230 in. Pin End Bore Diameter: 0.927 in. Big End Width (in): 0.830 in.


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Question Resolved

will this kit fit my 1966 Ford Mustang? (289 ci block). I noticed in the description its listed that it fits a 302 ci block. Just wanted to be sure before I purchased it.


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