Hayden clutch 2765

rad is not stock. Thicker core. Not by much though. I'm stickin' with my flex a lite nylon. I ran it all last year, up to 6800 RPM. Has an 8000 RPM rating and cooled my 340 really well. I won't be revving this new stroker that high, and it fits perfect in relation to the shroud.

I thought the Hayden gave you more clearance too.