Description
If you purchased your Bosch Style Aluminum Bypass Valve from JB Performance, it is rebuildable.
- Quantity 2 Flouro-rubber o-rings are included for sealing the piston to wall.
- Quantity 1 Flouro-rubber cap o-ring.
- Qunatity 1 Flouro-rubber discharge side o-ring.
Please clean all old lubrication out of the valve. Use a ViperLube or TransGel grease to lubricate the new orings before installing the piston. We do not recommend using any other oils or grease to lubricate the o-rings.

Bypass mounting bolts
JB Performance Holley/B&M/Weiand 250/256 and 6-71/8-71 blower to carburetor base gasket
Full rebuild kit MP45, MP62, MP90, MP112 with extended drive snout, short shaft
Impeller shim kit
Whipple stainless steel front cover case bolts
Bypass valve vacuum actuator 110 VA764E 