ARP Ring Compressor

4.1150˝ Ring Compressor Specialty Kit for Bore Sizes 900-1150

Part #: 900-1150

Overview

The ARP Ring Compressor (900-1150) is a precision-engineered specialty tool designed to facilitate the installation of piston rings in high-performance engine builds. Crafted from high-quality materials and featuring advanced CNC-machined components, this ring compressor kit is ideal for professional engine builders, performance enthusiasts, and anyone seeking reliable, repeatable results during engine assembly. Its specialized design ensures a perfect fit for bore sizes ranging from 900 to 1150 thousandths of an inch, making it suitable for a variety of large displacement or custom engine applications.

Whether you're rebuilding a race engine, performing a high-performance upgrade, or working on custom piston assemblies, this ring compressor helps you install piston rings smoothly and accurately. Its durable construction and thoughtful design reduce the risk of damaging piston rings or bore surfaces, ensuring a seamless installation process that saves time and effort. With the ARP Ring Compressor, you can confidently assemble your engine with precision and confidence, knowing that your components are protected and properly aligned.

Key Features

The ARP Ring Compressor (900-1150) offers several advanced features that set it apart from conventional tools:

• Constructed from CNC-machined 6061-T6 billet aluminum, providing exceptional strength, durability, and lightweight handling.
• True-radius design for each bore diameter ensures a perfect, uniform fit around piston rings, reducing installation stress and potential damage.
• Relieved to accommodate wire O-rings on the bottom, making it suitable for high-performance piston designs with integrated sealing features.
• Type 3 anodizing finish enhances corrosion resistance and longevity, ensuring the tool maintains its appearance and performance over many uses.
• Prominently engraved bore size markings in 3/4 inch high numbers allow for quick identification and easy selection during assembly.
• Designed for bore sizes from 0.900 to 1.150 inches, covering a wide range of high-performance engine applications.
• Precision CNC machining ensures tight tolerances and consistent quality, providing a reliable tool for professional and hobbyist engine builders.
• Relieved design reduces the risk of ring damage during installation, promoting longer piston ring life and optimal engine performance.
• Compatible with a variety of piston and ring configurations, making it a versatile addition to any engine building toolkit.

Construction & Design

The ARP Ring Compressor (900-1150) is meticulously crafted from high-grade 6061-T6 billet aluminum, a material known for its excellent strength-to-weight ratio and corrosion resistance. The CNC-machined construction guarantees precise dimensions and a smooth, polished finish, which is critical for ensuring a snug, yet gentle, fit around piston rings. The true-radius design of each bore size provides a uniform compression surface, minimizing the risk of ring deformation or damage during installation.

The tool features a relieved bottom section to accommodate wire O-rings, a common feature in high-performance pistons designed for enhanced sealing and durability. The Type 3 anodizing not only adds an attractive finish but also provides a durable, long-lasting surface that resists corrosion and wear. The prominent engraving of bore sizes ensures quick and accurate identification, streamlining the assembly process and reducing the chance of errors.

Installation & Fitment

The ARP Ring Compressor (900-1150) is a bolt-on tool that requires no special modifications or adjustments. Its precise bore sizing and relieved design make it compatible with a wide range of piston and ring configurations. To use, simply select the appropriate bore size, slide the compressor over the piston and ring, and carefully compress the ring into the piston groove during assembly. No cutting, drilling, or tuning is required, making it a straightforward and reliable tool for engine builders of all skill levels.

• Designed for use with high-performance pistons and rings in engines with bore sizes from 0.900 to 1.150 inches.
• Easy to handle and position, ensuring a secure fit during piston installation.
• Ideal for professional engine shops, race teams, and serious DIY enthusiasts.

What's Included

• Complete ring compressor kit with CNC-machined billet aluminum components
• Multiple bore size markings for quick identification
• All necessary hardware for assembly and use

Ideal For

• High-performance engine rebuilds and upgrades
• Custom piston and ring installations
• Professional engine shops and racing teams
• Enthusiasts seeking precision and reliability in engine assembly