SKU: 5015
GSC Power-Division Nissan VQ35 High Pressure Conical Valve Spring Titanium Retainer and Spring Seat Kit 2003-2008 350Z 2003-2007 G35
Equip your Nissan VQ35DE or VQ35HR engine with the GSC Power-Division high pressure conical valve spring kit including titanium retainers and spring seats. This complete set fits 2003-2008 Nissan 350Z and 2003-2007 Infiniti G35 models providing stable valve motion up to 10,000 RPM. Reduce valvetrain mass and improve high lift durability for track or street performance.
Key Features
- High Pressure Ratings: Seat pressure 180 lbs at 1.850 inch open pressure 480 lbs at 1.100 inch supports aggressive cams and high RPM operation without float
- Titanium Retainers TR-100: Lightweight at 10 grams each versus steel reduces rotating mass for quicker revving and less stress on components
- Titanium Spring Seats SS-100: Precision machined to eliminate wear and provide secure seating for consistent spring performance
- Conical Beehive Design: Progressive 5.75 4.75 3.75 coils with 1.220 inch to 0.780 inch diameters minimize harmonics and surge for smoother action
- Super Seven Plus Material: High tensile chromoly steel springs with 195 lb/in rate coil bind at 0.660 inch and 0.460 inch max lift ensure durability under boost or NA builds
Product Notes
- Complete kit includes 24 springs 24 titanium retainers and 24 titanium seats for full VQ35 cylinder head coverage
- Inspect valve seals and locks during install to match GSC components
- Packaged in foam inserts to protect springs during transit
Installation Notes
- Professional installation recommended.
- Measure installed height to achieve target pressures verify 1.850 inch seat height
- Compatible with OEM valves and GSC locks use assembly lube on springs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2008 | Nissan | 350Z | VQ35DE / VQ35HR |
| 2003-2007 | Infiniti | G35 | Coupe / Sedan VQ35DE |
Why Choose GSC Power-Division?
- Proven in drag racing and endurance events worldwide
- Made in USA with exact tolerances for Nissan engines
- Dyno and flow tested for real world valvetrain reliability
Frequently Asked Questions
-
Q: Does this kit fit both VQ35DE and VQ35HR engines?
A: Yes direct fit for 2003-2008 350Z VQ35DE/HR and 2003-2007 G35 VQ35DE no modifications needed -
Q: What materials are used in the retainers and seats?
A: Aerospace grade titanium for retainers TR-100 and seats SS-100 offers strength to weight ratio over 3x better than steel -
Q: What is the warranty and return policy?
A: Lifetime warranty against spring failure when installed correctly no returns on opened kits due to sanitary reasons
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: Special order ships within 3-5 business days
- Packaging: Foam protected box 8 x 6 x 4 inches
- Weight: 1.90 lbs
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