MACE 1.9:1 HIGH RATIO ROCKER KIT TO SUIT HSV SENATOR VT VX VY LS1 5.7L V8

Back by popular demand, our 1.9:1 remanufactured high ratio rocker arms are an excellent bang-for-buck modification that will noticeably improve the HP of your LS1. The advantage of using higher ratio rockers is that the same cam lobe profile can produce a greater total valve lift which in turn creates more mid-range to top end power without the need of going through the effort of doing a camshaft upgrade. 

To install our Mace high ratio rocker arms, all that is required is the removal of the rocker covers which will expose the standard 1.7:1 items. These are then removed and replaced with our performance 1.9:1 units!

Key Benefits:

• No tune required.
• Expect gains of 15-20kw at the flywheel.
• Easy DIY installation.
• Retains the strong and rigid properties of factory rockers.
• Reduced wear and tear on the valve-train coupled with a noticeable performance improvement.
• Remanufactured and tested right here in Australia.

Contents:

• 01 X Bolt pack
• ​01 X Rocker lubricant
• 16 X 1.9:1 Straight high ratio rocker arm

Vehicle Fitment Guide

Notes:

• High ratio rockers are not suitable for use with aftermarket cams. Excessive valve lift may cause engine damage.
• Valvetrain upgrade is recommended for high mileage engines or if revving past the factory limiter.