ISR Performance Wilwood Master Cylinder Adapter Plate - Nissan S13/14 to LS1 T56

The ISR Performance Master Cylinder Adapter Plate lets you bolt a Wilwood 3/4-inch clutch master cylinder into the factory S13 or S14 clutch master location for an LS swap running an F-body T56 transmission. CNC-billet aluminum, drilled for common M8 x 1.25 mounting hardware. Solves a fundamental hydraulic mismatch in the LS-into-240SX swap path.

What It Does

LS-swapping a 240SX with an F-body T56 transmission creates a clutch hydraulic problem. The T56's internal slave cylinder is designed to be paired with the GM master cylinder from the donor car, which won't bolt into the 240SX firewall and uses a different pushrod geometry. The accepted fix is a Wilwood 3/4-inch master, which has the right bore size to actuate the T56 internal slave and accepts a standard pedal-style pushrod. This adapter plate is the bracket that makes that Wilwood master bolt cleanly into the factory S13/S14 clutch master location.

Fitment

• 1989-1994 Nissan 240SX (S13) with LS swap and F-body T56 transmission
• 1995-1998 Nissan 240SX (S14) with LS swap and F-body T56 transmission

Important: Master Cylinder and Hardware Not Included

This kit is the adapter plate only. You'll need to source separately:

• Wilwood 3/4-inch clutch master cylinder
• M8 x 1.25 mounting bolts

What's in the Box

• 1x CNC billet aluminum master cylinder adapter plate

Product Details

Brand: ISR Performance

Part Number: IS-MCA-S134

Type: Clutch Master Cylinder Adapter Plate

Vehicle Fitment: 1989-1998 Nissan 240SX (S13/S14) with LS swap and F-body T56

Master Cylinder Compatibility: Wilwood 3/4-inch clutch master cylinder (not included)

Mounting Hardware: M8 x 1.25 (not included)

Material: CNC billet aluminum

Mounts To: Factory S13/S14 clutch master cylinder location

Sold: Adapter plate only

Legality: Off-road and competition use only