This is our 6" Radial SS full kit. It features a D size (1.5" OD and 1.36" ID) 5" titanium tube with a 2" machined in spacer. Side "A" is machined to a 1-3/8" x 24 thread. Side "B" is threaded in 1-7/16 x20 which is standard D thread.
The kit comes with:
(1) Titanium D cell tube in 6"
(7) 17-4 SS Large faced radials
(1) D cell end cap
You may add a direct thread adapter onto this kit for an additional $55
The supplied end cap takes a 1/2" allen key to tighten and does not have a shoulder - (this offers adjustability .06" each way)
Note: This kit does not require any shimming or tuning of any kind. It's truly plug and play - you DO need a way to mount.