4.250" to 4.310" inch size. Comp Cams or Powerhouse Adjustable Tapered Piston Ring Installer Compressors work just like our solid models, except that they incorporate a split down the side and a large hose clamp for adjustment. Perfect for those who will be working on a variety of bore sizes or for those sizes not covered by our standard tapered piston ring installer compressors. Each model has a range of about .090", so one of these can replace several of our standard tapered style. Hard anodized for wear and color
Piston installer, compresses piston rings for installing into block