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SKU: 3031.001-1
GSC Power-Division Toyota 2JZ-GE/GTE Manganese Bronze Exhaust Valve Guide +.001in Oversize OD - Single (1991-2005)
Equip your Toyota 2JZ engine with the GSC Power-Division Manganese Bronze Exhaust Valve Guide +.001in Oversize OD - Single for reliable performance in high-revving builds. Designed for 86mm bore cylinder heads on 2JZ-GE and 2JZ-GTE engines in vehicles like the Toyota Supra Lexus GS300 and IS300 this guide corrects minor bore wear to maintain tight valve stem clearances. Manganese bronze material delivers lasting durability under extreme heat and pressure.
Key Features
- Manganese Bronze Material: Provides high wear resistance thermal conductivity and strength ideal for exhaust side demands in boosted 2JZ applications
- +0.001in Oversize OD: 0.513in outer diameter fits heads with 0.001-0.002in bore enlargement restoring precise guide alignment without machining
- Exhaust-Specific Design: Matches 2JZ exhaust valve stem 7.97mm ID with 0.3145in/+0.0005in tolerance for perfect sealing and flow
- Precision CNC Machined: Ensures consistent fitment length of 1.535in and tight tolerances for race-level reliability
- Single Guide Packaging: Allows exact replacement needs pairs with GSC valves for complete valvetrain upgrade
Product Notes
- Sold individually full set of 8 is part 3031.001-8
- Inspect cylinder head guide bores with calipers before install to confirm oversize need
- Protects packaging prevents damage during shipping
Installation Notes
- Professional installation recommended.
- Freeze guides and heat head to 350F for press fit or use valve guide driver tool
- Compatible with stock or GSC valve seats no additional hardware required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1993-1998 | Toyota | Supra | Base Turbo |
| 1998-2005 | Lexus | GS300 | All |
| 2001-2005 | Lexus | IS300 | All |
| 1991-2000 | Toyota | Aristo | 2JZ-GE 2JZ-GTE |
| 1996-2004 | Toyota | Mark II | Grande 2JZ-GE |
| 1991-2005 | Toyota | Chaser | 2JZ-GE Tourer |
Why Choose GSC Power-Division?
- Proven in drag racing and drift with thousands of 2JZ builds worldwide
- USA manufactured to exacting standards for consistent performance
- Engineered specifically for high boost RPM valvetrain durability
Frequently Asked Questions
-
Q: Will this fit my MK4 Supra 2JZ-GTE head?
A: Yes fits all 86mm bore 2JZ-GTE heads including Supra Aristo and Soarer verify bore size first -
Q: Why manganese bronze over cast iron?
A: Manganese bronze resists wear better conducts heat faster and handles high exhaust temperatures without galling valve stems -
Q: What is the warranty and install tip?
A: Lifetime warranty against manufacturing defects install with proper tools to avoid damage
Shipping & Handling
- Method: USPS First Class or UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Individual protective sleeve in small box 4x3x1in
- Weight: 0.1 lbs
GSC Power Division
GSC Power Division is a manufacturer of precision-engineered camshafts, valve springs, and valvetrain components designed for high-performance and competition engines across domestic, import, and diesel platforms. Founded by engineers with deep roots in motorsport, GSC Power Division components are machined to exacting tolerances and heat-treated to survive the demands of forced induction and high-rpm applications that destroy stock valvetrain parts. The brand is particularly well-known in the Mitsubishi Evo, Subaru STI, Nissan RB, and Toyota 2JZ communities where aggressive camshaft profiles are essential for extracting maximum power from turbocharged four-cylinder and six-cylinder engines. Whether building for drag racing, road course competition, or a high-powered street car, GSC Power Division camshafts and valve springs are a proven upgrade path. Popular Upgrades GSC Power Division S1, S2, and S3 camshafts are the most popular selections, with each profile offering progressivel...
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