RAM HDX LS Clutch & Flywheel Kit – 12” x 1-1/8”-26 Spline – GM LS 6-Bolt – Part# 25-831

The RAM HDX LS Clutch & Flywheel Kit (25-831) is a complete performance package for LS engine swaps, late-model GM applications, and Tremec transmission conversions. Built around a 28 lb RAM billet steel flywheel and 12” HDX clutch assembly, this kit delivers superior holding capacity, smooth engagement, and long service life for street-driven or performance LS builds up to 500 HP.

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Key Features

• Complete LS clutch + 28 lb billet steel flywheel package
• 12” x 1-1/8”-26 spline
• Diaphragm-style pressure plate
• 2800 lb clamp load for excellent engagement and pedal feel
• Organic friction material for smooth street driving
• 5-spring helix hub provides silky engagement and strength
• Larger 12” surface area = better heat dissipation + longer clutch life
• Compatible with factory slave cylinders
• Includes pressure plate bolts and dowel pins
• Perfect for LS engine swaps and Tremec conversions
• For over 500 HP, upgrade to RAM 25-931HPG

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Vehicle Fitment

• 1998–2002 Camaro V8 – pairs with RAM 78165 hydraulic release bearing
• 2010–2015 Camaro SS – pairs with RAM 78180 hydraulic release bearing
• 1997–2013 Corvette – pairs with RAM 78170 hydraulic release bearing
• 1997–2015 GM LS 6-bolt engine swaps
• Compatible with factory slave cylinders
• Works with Tremec transmission swaps

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Flywheel Specs

• Billet steel construction
• 168-tooth
• 28 lb weight
• 6-bolt LS crank pattern
• Flywheel bolt set: 528

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What’s Included

Kit consists of:

• RAM 1550 (pressure plate)
• RAM 88935 (12" organic disc)
• RAM 490 bolt set
• Billet steel flywheel
• Dowel pins
• Alignment tool
• (Hydraulic release bearing sold separately)

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Why Choose RAM LS Kits

RAM’s LS clutch packages provide the perfect balance of drivability, power capacity, and durability. The large 12” disc and high clamp load deliver improved holding power while maintaining excellent street manners.

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Why Buy From Bowler Performance

• Authorized RAM distributor
• Fast shipping
• Expert drivetrain tech support
• Trusted by hot rod, pro touring, and engine swap builders nationwide

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Part Number

25-831