SKU: SPRK-2521-2BM-ST | UPC: 1037721244165
Supertech BMW S54 Dual Valve Spring Kit (w/SEAT-BMS55) 2001-2006 E46 M3
Equip your BMW S54 engine with the Supertech Dual Valve Spring Kit including SEAT-BMS55 seats designed specifically for 2001-2006 E46 M3 models. This kit delivers consistent spring pressure to prevent valve float during high RPM operation. Engine builders rely on it for reliable performance in street and track applications.
Key Features
- Dual Spring Design: Inner spring wire dia 1.80mm OD 9.50mm outer wire dia 3.00mm OD 22.50mm for reduced harmonics and rev capability over 8500 RPM
- Precise Pressure Ratings: Seat pressure 160lbs at 1.700in open 380lbs at 1.100in max lift 11.20mm coil bind height 0.886in
- Premium Materials: High tensile chrome silicon steel shot peened heat treated and stress relieved for extended fatigue life
- Included SEAT-BMS55: Precision machined valve seats ensure proper fit and seal with stock or aftermarket valves
- Complete Kit: 24 dual valve springs and 24 seats for full top end rebuild on S54 engines
Product Notes
- Verify valve stem to guide clearance before installation
- Springs maintain stock installed height for direct compatibility
- Store in original packaging to prevent contamination
Installation Notes
- Professional installation recommended.
- Use a high quality spring compressor tool rated for dual springs
- Compatible with stock retainers and locks or Supertech titanium upgrades
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2006 | BMW | M3 | Coupe |
| 2001-2006 | BMW | M3 | Convertible |
| 2001-2006 | BMW | M3 | CSL |
Why Choose Supertech?
- Proven in motorsport with championship winning teams
- In-house manufacturing controls every production step
- Computer optimized spring rates for exact engine match
Frequently Asked Questions
- Q: Does this fit all 2001-2006 BMW E46 M3 models?
A: Yes it fits all S54 equipped E46 M3 Coupe Convertible and CSL models from 2001-2006 with no modifications needed - Q: What material are the springs made from?
A: Constructed from premium chrome silicon steel with shot peening heat treatment and black oxide finish for corrosion resistance and durability - Q: What is the warranty on this kit?
A: Supertech offers a limited lifetime warranty against manufacturing defects when installed by certified professionals
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure foam packed box 12in x 8in x 6in
- Weight: 3 lbs
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