TR Subaru EJ20 / EJ25 Billet Timing Belt Guide – WRX, STI, Legacy GT, Forester XT (TR-AS1001)

Protect your EJ engine from a very expensive mistake. The TR Subaru EJ20/EJ25 Billet Timing Belt Guide is a simple but critical upgrade that helps prevent timing belt jumps and skips on high-revving Subarus. When you’re launching hard, shifting at redline, or tracking the car, belt movement can be enough to skip a tooth – and on interference EJ engines, that can mean bent valves and a full teardown.

The TR guide is built from thick billet aluminum and replaces the flimsy factory timing belt guide. It sits over the crank sprocket area, keeping the timing belt accurately located and supported when the engine is in a constant state of high RPM.

Key Benefits

• Helps prevent timing belt jump/skip during hard launches, high-RPM shifts, and aggressive track use.
• Protects your built EJ engine from potentially catastrophic timing-related failures.
• Stronger than OEM thanks to a thick billet aluminum construction that resists flex.
• Improved belt control around the crank sprocket area where movement is most critical.
• Simple bolt-on upgrade that installs in place of the factory timing belt guide.

Features

• Material: CNC-machined billet aluminum
• Direct replacement for the factory timing belt guide on Subaru EJ20 and EJ25 engines
• Designed for high RPM use – ideal for track, time attack, drag, and spirited street driving
• Works with OEM timing belts and most aftermarket timing belts
• Compatible with stock timing covers when installed and adjusted correctly
• SKU: TR-AS1001
• Brand: Tomioka Racing

Recommended For

• Higher power Subaru EJ20/EJ25 builds
• Cars that frequently see redline or extended high RPM use
• Track cars, time attack builds, and road course cars
• Owners refreshing timing components and wanting extra protection

Vehicle Applications*

• Subaru Impreza WRX (EJ20 / EJ25)
• Subaru Impreza WRX STI (EJ25)
• Subaru Legacy GT (EJ-series turbo engines)
• Subaru Forester XT (EJ-series turbo engines)
• Other Subaru EJ20 / EJ25 applications using the standard OEM timing belt guide location

*Fitment may vary by market and engine configuration. Always confirm your engine code and timing components before ordering.

Installation Notes

• Install in place of the factory timing belt guide during a timing belt service.
• Ensure correct clearance between the guide and timing belt – the belt should not be pinched.
• Professional installation is recommended, especially on built or high-value engines.