These are our newest WR Valve Kits designed for direct replacement of the OEM type valve/guide/spring combination. Two kits are available...for early heads with 38mm intake and 31mm exhaust; and late heads with 38mm intake and 34mm exhaust. Either kit will provide a 7% improvement in flow with no additional porting or modifications. They will also work with any of the stock or aftermarket pistons available for use with stock valves. The 31mm replacement valve is sized at 32mm to allow for a better valve job with the stock valve seat.

The 8mm stem intake and exhaust valves are both custom made for us by Manley and are designed to take the added heat and abuse of an air-cooled engine.

The single groove locks are far superior to the three groove oem type, and eliminate wear at the retainer.

The valves are designed to run hardened 2mm lash caps which provide a larger contact area for the rocker, and are sized to provide the correct length insuring proper rocker geometry and full valve lift.

The special WR Locking Valve Guides use a Viton intake seal and have a special ridge that is counter-bored into the head and held in place by the WR Chromoly Spring Pad to lock the guide into place and center the inner valve spring.

The WR Dual Springs can be set up for a variety of cams from .325” to over .500” lift and are good for over 7000 rpm.

The WR Chromoly Retainers are specially designed for our dual springs and provide light weight and super long life.

These are not marginal quality Chinese parts! Everything is made in the USA. We didn’t just pull these parts off the shelf. They have been designed and tested in dozens of engines and fine-tuned and proven to work properly. Don’t experiment…use the best!  You can’t buy a better combination for the 356 engine.

COMPLETE KIT INCLUDES:

4 - 38mm stainless Manley intake valves and lash caps

4 - 32mm or 34mm stainless Manley exhaust valves and lash caps

4 - WR Locking Intake Guides with Viton seals.

4 - WR Locking Exhaust Guides.

8 - WR High Performance Dual Springs.

8 - WR Chromoly Spring Pads.

8 - WR Chromoly Retainers.

16 - Manley single bead valve locks.

Complete instructions for set up of valve tip height, spring pressure, and suggested porting and chamber modification if desired.

Valve guides available in .555" and .556".

 PLEASE LET US KNOW WHICH KIT YOU NEED WHEN ORDERING...EARLY OR LATE.