Hays Street 650 Conversion Clutch Kit

The Hays Street 650 Conversion Clutch Kit is a purpose-engineered street/strip clutch solution built for serious high-horsepower performance builds. Designed to handle highly modified engines up to 650 naturally aspirated horsepower — or up to 600 horsepower in forced induction and nitrous applications — the Street 650 line delivers race-ready holding power without sacrificing the daily drivability that performance enthusiasts demand. Available in multiple configurations to support a wide range of classic and modern high-performance drivetrain builds, this product line is a trusted solution for conversion applications.

Dual Friction Disc Technology:

At the heart of every Street 650 kit is a high-performance dual friction disc design that combines two complementary friction surfaces for optimal performance across all driving conditions. A sintered metallic friction surface provides superior heat dissipation and aggressive grip under hard acceleration, while a companion organic friction surface delivers smooth, street-friendly engagement. Together, these surfaces resist clutch slip under high-load conditions while keeping pedal effort manageable for everyday driving.

Key Features:

• Rated for up to 650 naturally aspirated horsepower (600 HP for forced induction and nitrous combinations)
• Dual friction disc design — sintered metallic and organic surfaces working in tandem for smooth engagement and excellent holding capacity
• Upgraded spring hub with heavy-duty damper springs engineered to handle greater shock loads than standard OEM components
• Up to 30% more clamping pressure than stock OE clutch assemblies
• Heavy-duty pressure plate for increased clamping force and long-term durability
• Engineered for compatibility with modern 5-speed and 6-speed transmission conversions
• True street/strip performance — ideal for frequent track use and spirited high-performance street driving
• Each kit includes pressure plate, clutch disc, throwout bearing, and alignment tool

Whether you're building a classic muscle car with a modern transmission swap or constructing a dedicated dual-purpose performance vehicle, the Hays Street 650 Conversion Clutch Kit delivers the confidence-inspiring holding power needed at the strip with the refinement expected on the street. Backed by Hays' decades of American performance clutch engineering, the Street 650 line is a premium solution for serious high-horsepower conversion builds.