S4 RX-7 Turbo II Thermal Lower Intake Manifold Gasket (Durlon 9400) - Replaces N318-13-111D
$41.99 USD
Upgrade your 1987-1988 Mazda RX-7 Turbo II (S4) lower intake manifold interface with a premium thermal barrier gasket engineered to eliminate heat soak and prevent vacuum/boost leaks.
Direct replacement for OEM Mazda Part Number: N318-13-111D
WHY DURLON 9400 CARBON-FILLED PTFE?
Unlike standard paper OEM gaskets or cheap virgin PTFE materials that cold-flow under heat and clamping pressure, this gasket is precision-cut by hand using custom templates from 1/16" (1.5mm) Durlon® 9400 carbon-filled PTFE. Durlon 9400 is specifically designed for high-stress industrial environments, giving rotary owners a superior intake barrier.
KEY FEATURES & BENEFITS:
• Thermal Heat Shielding: Acts as a thermal barrier between the hot engine iron and the lower intake manifold, lowering intake air temperatures (IATs) and resisting heat soak.
• Zero Plastic Creep / Cold Flow: Formulated with carbon fillers to resist creep relaxation under bolt torque and extreme engine thermal cycles—maintaining a tight seal over time.
• No Sealants Required: Engineered to conform and seal perfectly dry. No RTV, gasket dressing, or sticky sealants needed during installation.
• Fully Reusable: Impermeable to fuel, oil, coolant, and blow-by. Highly durable and non-stick, making it ideal for track cars and engines undergoing frequent manifold removals or teardowns.
• Extreme Temperature & Chemical Resistance: Rated for continuous temperatures up to 500°F (550°F max continuous) and pressures up to 1,500 psi.
PRODUCT SPECIFICATIONS:
• Material: Durlon® 9400 Carbon-Filled PTFE Resin
• Thickness: 1/16" (1.5mm)
• Application: 1987–1988 Mazda RX-7 Turbo II (13B S4 LIM to Engine Block)
• OEM Cross-Reference: N318-13-111D
LIMITED LIFETIME WARRANTY:
We stand behind the durability and performance of our gaskets. This product includes a Limited Lifetime Warranty covering manufacturing defects and material failures.
*Note: Warranty does not cover damage resulting from improper installation, incorrect torque sequencing, over-torquing, or misuse.