Cosworth 4B11 Replacement Spring Retainer
Manufacturer Part # 20007435
If you are performing maintenance on your head, or if you’re in the middle of re-machining or any major job performed on the head of the 4B11, then it may be a great idea to upgrade your valve spring retainers.
If you plan on building your engine to rev higher, then you want essential components in your head. If you have larger valves, upgraded valve springs, then it only makes sense to get the Cosworth Replacement Valve Spring Retainer.
These are crafted from high-grade metals, and have been built to sustain high revs in high performance drivetrains.