MAP Ultimate Duty H11 Head Studs

For Your Mitsubishi Evolution X

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Consider these an insurance policy for your head gasket…

If you’re looking to make big power but don’t like the idea of lifting your cylinder head and replacing head gaskets frequently these are exactly what you need! These studs are manufactured specifically for us by A1 Technologies and utilize an H11 material that is much stronger than the typical 8740 chromoly and yields a tensile strength of 260,000 psi. They are also provisioned with a hex broach on the top of the stud enabling you to install them with the cylinder head on the car if necessary.

What is so different about these head studs?

The MAP Ultimate Duty Head Studs include an additional feature known as a “dog point” (shown below) that seats the stud in the block and preloads the fastener for an accurate and repeatable torque sequence.

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Exedy Heavy Duty Clutch Kit | MM022HD

Cerametallic Twin Plate for the Evo 8/9

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Evo 8/9 Stage 5 Clutch – Exedy Twin Disc MM022HD

For high-powered applications EXEDY offers multi-plate clutches. Whether you participate in drag, road, and rally racing event, an Exedy Twin disc clutch will meet your needs! All Exedy Twin Plate clutches come with a lightweight chromoly steel flywheel, and the famous purple anodized forged aluminum clutch cover.


  • Disc Size: 200mm
  • Spline Teeth / Major Dia: 23T / 26.2mm
  • Clamping Force/Load exerted (lbs): 2653
  • Disc Material: Ceramic
  • Number of Disc: Twin
  • Type (Push/Pull): Pull
  • Sprung Center (D-core): Yes
  • Clutch Torque: 1106
  • Torque Capacity at Wheels: 615
  • Flywheel to Crank Bolt ft-lb: 99
  • PP Assby. to Flywheel ft-lb: 23

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