Made with Wiseco sleeve liners to offer the same hardness as Wiseco forged pistons. These compressor sleeves are hard anodized and Teflon coated for low friction and long-lasting wear resistance. These sleeves have a smooth radius that is tapered to the specific bore size to make installing any piston easy. You'll find these sleeves compress piston rings smoothly and evenly, greatly reducing the difficulty of installing high-performance oil rings. If you've ever broken or bent a ring, these high-quality sleeves will be a lifesaver for your shop and come in a variety of sizes. Part # RCS09000 90mm Black Anodized Piston Ring Compressor Sleeve available at JM Auto Racing. JM Auto Racing isn't just another shop where you can get performance parts and accessories. Here, we aim to customize every shopping experience to make it an enjoyable and memorable one. Now, some may say that a car becomes a lot like its owner over time. JM Auto Racing strives to bring out the best in every vehicle, so you can trust us if you want your vehicle to be a better part of you. JM Auto Racing prides itself on providing everyone with a full range of quality auto parts. If you consider your car and truck to be a part of you, then this is the place to go. And if you want to have a unique relationship with your vehicle, we'll help you build it. JM Auto Racing has that special touch to handle all the accessories and parts your car and truck needs.