These high-performance racing cams with a 280ø profile are a great choice for engines built for time attack and drag racing. They're perfect with a 64mm+ turbo and work really well with E85 and similar ethanol blend fuels. You'll get a broader power band and improved throttle response when you use MIVEC.
- Kelford Cams recommends using valve spring KVS63-BTK-X for engines that will be revving up to 9000rpm and up to 40psi boost.