COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 500 seals have a .630" outer diameter and fit applications with 5/16" valves and .530" OD valve guides.
For more than 35 years, the COMP Cams(R) mission has never changed: to produce the highest-performing products possible, provide customers with superior service, and to lead the industry in technological development. While the COMP Performance Group(TM) has grown to multiple companies and hundreds of employees, we still retain the competitive spirit and desire to be the very best that has positioned COMP Cams(R) as the absolute leader in valve train components.
  • Positive Stop Teflon
  • 1 Year Limited Warranty

Application Summary:

Year Make/Model
1970-1971 Dodge Challenger
1966-1971 Dodge Charger
1966-1971 Dodge Coronet
1966-1967 Plymouth Belvedere
1966-1967 Plymouth Belvedere II
1970-1971 Plymouth Cuda
1966 Plymouth Fury
1967-1971 Plymouth GTX
1968-1971 Plymouth Road Runner
1966 Plymouth Satellite

Fast Efficient Shipping

Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.