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Street Performance Clutch Capacity for Volvo Turbo Models
SPEC SO601 is a Stage 1 clutch kit for verified Volvo S40 T5, S60R, and V70R 2.5L turbo applications using the original dual-mass flywheel arrangement. Its full-face high-performance organic disc is designed for smooth street engagement with increased torque capacity over a stock replacement.
Key Features
- SPEC SO601 is engineered for performance street use with smooth engagement
- Full-face organic friction disc supports daily drivability
- Designed for the original dual-mass flywheel identified as Volvo 31259329
- Pressure plate and friction disc are matched as a Stage 1 assembly
- Assembled to order by SPEC
- Requires the manufacturer-specified break-in before hard use
Fitment
| Years | Make | Model | Engine | Flywheel Requirement |
|---|---|---|---|---|
| 2005-2006 | Volvo | S40 T5 | 2.5L turbo | OE dual-mass flywheel 31259329 |
| 2004-2007 | Volvo | S60R | 2.5L turbo | OE dual-mass flywheel 31259329 |
| 2004-2007 | Volvo | V70R | 2.5L turbo | OE dual-mass flywheel 31259329 |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | SO601 |
| Product type | Stage 1 clutch kit |
| Friction style | Full-face high-performance organic |
| Intended use | Performance street |
| Flywheel type | Original dual-mass |
| Package dimensions | 14.4 x 13.8 x 3.8 inches |
| Package weight | 13.7 pounds |
| Manufacturer warranty | 120 days |
What's Included
- SPEC SO601 Stage 1 pressure plate
- Matched full-face organic friction disc
- Flywheel is not included
- No additional release components are listed as included
About SPEC
SPEC manufactures staged clutch systems and flywheels for street, track, and competition vehicles. Its Stage 1 kits emphasize progressive engagement and increased capacity for modified street applications.
Related Parts
- No exact compatible ACTIVE companion product was verified for this listing.
FAQ
What is the SO601?It is a Stage 1 pressure-plate and organic-disc clutch kit for the verified Volvo 2.5L turbo applications listed above.
Does this kit fit every Volvo S40, S60, or V70?No. Fitment is limited to the model years and performance variants shown in the fitment table.
Which flywheel does this clutch use?The verified application uses the original dual-mass flywheel identified by Volvo part number 31259329.
Is a flywheel included?No. The flywheel must be inspected and prepared separately or replaced with the correct compatible unit.
Does the flywheel need resurfacing?SPEC states that a used flywheel must be resurfaced to the proper specification before the new clutch is installed.
Is break-in required?Yes. Complete at least 450 miles of normal stop-and-go driving before hard launches, dyno testing, towing, or competition use.
What driving style is Stage 1 intended for?Stage 1 is intended for performance street vehicles that need more capacity while retaining smooth, progressive engagement.
What should be inspected during installation?Inspect the flywheel, rear main seal, input shaft, release system, hydraulic components, and transmission mounts before assembly.
Installation Instructions
- Confirm the vehicle, engine, flywheel configuration, and SO601 package label before disassembly.
- Disconnect the battery, support the vehicle securely, and remove the transmission according to the Volvo service procedure.
- Inspect and correctly resurface or replace the dual-mass flywheel and service worn release components.
- Clean friction surfaces with residue-free brake cleaner and keep grease away from the disc.
- Install the disc and pressure plate using the correct alignment and manufacturer torque sequence.
- Reinstall the transmission, verify release operation, and complete the required 450-mile break-in.
California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
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