Head Hoggers Tapered Ring Compressor Twin Cam 4.000 bore If you have a 12

If you have a 12 point bolt style lid

but regret on long rides

**NEW** Let us know if you want RED or BLACK filter

The filter has been flushed up to the engine as much as possible to give max legroom while still giving great flow

so you can't get it anywhere else but it fits perfectly with any of our oval filters

Head Hoggers Tapered Ring Compressor Twin Cam 4.000 bore If you have a 12Our patented tapered ring compressors absolutely PERFECT the piston installation process. The days of that ridiculous spring loaded plier contraption are over! Just Line up your rings, pop the compressor onto the base of the cylinder and drop it onto the piston! It really is that easy, and you'll never catch a ring again! This 4" bore is for factory 110 engines non "drop in" (Each compressor will do up to . 010" over the labeled bore size. )