SKU: 901-8150 | UPC: 672036022327
ARP 81.5mm Ring Compressor for VW/Audi 1.8T, Honda B18, BMW M42
ARP 81.5mm Ring Compressor (901-8150) simplifies piston installation in performance engines with 81.5mm pistons including VW/Audi 1.8T, Honda B18, and BMW M42 builds. This precision tool delivers even clamping force to slide pistons into cylinders without ring damage or wall scoring. Built for consistent results in street and race engine assemblies.
Key Features
- Precision Tapered Profile: Gradually squeezes rings evenly to avoid distortion or breakage during piston insertion
- Knurled Grip Surface: Provides firm hold in oily conditions for controlled placement
- Exact 81.5mm Fit: Matches oversized pistons in popular 81mm bore engines for seamless compatibility
- 6061-T6 Aluminum Build: Lightweight yet tough construction handles repeated professional use
- ARP Engineering: Application-matched design ensures reliable clamp load every time
Product Notes
- Confirm piston OD measures 81.5mm prior to use
- Lubricate rings lightly for optimal compression
- Store in dry area to maintain taper accuracy
Installation Notes
- Professional installation recommended.
- Slide compressor over piston rings and taper into cylinder bore
- Use ARP-recommended lubes on threads and rings if applicable
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1996-2006 | Audi | A4 | 1.8T |
| 1998-2005 | Audi | A6 | 1.8T |
| 1999-2006 | Volkswagen | Golf | GTI 1.8T |
| 1999-2005 | Volkswagen | Jetta | GLI 1.8T |
| 1994-2001 | Honda | Integra | GSR / Type R |
| 1992-1999 | BMW | 3 Series | 318i / 318is M42 |
Why Choose ARP?
- Trusted brand in performance engine components for decades
- Reliable tools match fastener quality standards
- Precision machined for pro-level engine work
Frequently Asked Questions
- Q: Which piston sizes does it support?
A: Specifically for 81.5mm diameter pistons common in rebuilt VW/Audi 1.8T, Honda B18, BMW M42 engines. - Q: What is the construction material?
A: Machined 6061-T6 aluminum with knurled finish for strength and secure grip. - Q: What support does ARP provide?
A: ARP backs tools with satisfaction guarantee, contact for warranty claims.
Shipping & Handling
- Method: UPS Ground / USPS
- Availability: In stock – ships same or next business day
- Packaging: 5.8 x 5.3 x 1.2 inches box
- Weight: 4.8 oz
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