Jims Twin Cam Compression Release Guide 1169

If you're running a big-inch or high-compression Twin Cam engine, compression release valves are essential for reliable cold starts and reduced parasitic drag during operation. The JIMS 1169 guide kit eliminates the guesswork by providing precision tooling and a complete installation fixture, so you can modify both cylinder heads with confidence—whether or not valves are already installed. This is the kind of detail-oriented engineering that separates a properly tuned engine from one that's left on the table.

• Fits Twin Cam engines
• Front and rear compatible
• Big-inch applications supported
• High-compression rated
• Complete installation kit included
• Precision drill fixture
• Spot-face bit provided
• Thread-tap tool included
• Installs with or without valves
• Step-by-step instructions
• Valve-ready heads compatible
• Professional-grade accuracy