This is a replacement purple inline pipe exhaust springs and seals set for .21 engines from OFNA . Includes two purple silicone seals, and three springs.
This product was added to our catalog on May 11, 2007.
Friday, Aug 8 2008 (about 7 years ago)
OFNA Springs & Seals Purple, Inline
These things wear out aftera couple races im not sure if all seals go out this fast but replacing every couple weeks at $8 is costly. I am going back to the OS seal, it is a bit more pricy but if it last longer may be worth it.