The Texas Speed x ARP Tapered Piston Ring Compressor is an engine assembly tool for installing pistons into LS blocks. Each compressor is machined from 6061-T6 billet aluminum tubing to a true radius for one specific bore diameter, so the rings are squeezed evenly around the full circumference as the piston is pushed into the cylinder instead of being pinched at points the way a conventional band-style compressor can.
The compressors are relieved and finished with a Type 3 hard anodize for durability, use a wire O-ring at the base, and have the bore size engraved in 3/4" high numbers so the right tool is easy to grab off the shelf. Texas Speed offers five bore sizes: 3.820", 4.005", 4.030", 4.070" and 4.125", covering common stock and overbored LS combinations. Choose the size that matches the finished bore of the block.
Specifications
- Tool type: Tapered piston ring compressor, Texas Speed x ARP
- Material: 6061-T6 billet aluminum tubing
- Design: True radius machined for each individual bore diameter
- Finish: Type 3 anodized, relieved
- Base: Accommodates wire O-ring
- Identification: Bore size engraved in 3/4" high numbers
- Bore sizes offered: 3.820", 4.005", 4.030", 4.070", 4.125" (selected at ordering)
- Application: LS engine assembly
Ordering Options
Select the bore size that matches the finished cylinder bore of the block: 3.820" (ARP-899-8200-TSP), 4.005" (ARP-900-0050-TSP), 4.030" (ARP-900-0300-TSP), 4.070" (ARP-900-0700-TSP) or 4.125" (ARP-900-1250-TSP). Each size is sold as a single compressor.
FAQ
What bore sizes does the Texas Speed x ARP ring compressor come in?
Texas Speed offers the tapered ring compressor in 3.820", 4.005", 4.030", 4.070" and 4.125" bore sizes. Each one is a separate tool machined for that single bore diameter, so order the size that matches the finished bore of the block.
Which ring compressor size do I need for my LS engine?
Match the compressor to the actual finished bore of the block, not the nominal displacement. For example a 4.005" or 4.030" compressor suits a bored LS1, LS2 or LS3 style block depending on the overbore, while 4.070" and 4.125" cover larger bores. Measure the cylinder before ordering.
Why use a tapered ring compressor instead of a band style tool?
A tapered compressor machined to a true radius squeezes the rings evenly around the whole piston as it slides into the bore, which reduces the chance of a ring catching on the deck or breaking. Texas Speed and ARP machine each size from 6061-T6 billet aluminum for this reason.
What is the Texas Speed x ARP ring compressor made of?
It is machined from 6061-T6 billet aluminum tubing, relieved, and finished with a Type 3 hard anodize. The base is made to accept a wire O-ring and the bore size is engraved in 3/4" high numbers on the tool.
Is the ring compressor only for LS engines?
Texas Speed markets the tool for LS engine assembly, but a tapered ring compressor is a bore-size tool. Any engine with a finished bore matching one of the five sizes offered can use it.
