The factory oil block on the Nissan SR20DET is a known weak point. The original oil filter sensor screw is prone to breaking, which can lead to sudden loss of oil pressure and catastrophic engine damage. Tomei identified this issue during professional N2 racing more than a decade ago and developed a reinforced oil block to eliminate the failure. After the N2 series ended the part was discontinued, but strong demand from SR20 owners led Tomei to revive the design with meaningful improvements.
The current Tomei N2 Oil Block (part number TB206A-NS08A) is fabricated from high-tensile aluminum and finished in a distinctive gold anodizing. It is lighter than the earlier version while retaining the strength needed for performance use. The block features #10 oil inlet and outlet ports along with dedicated PT1/8 fittings that accept the factory-style oil pressure and oil temperature sensors. This makes it a clean, direct upgrade for RWD SR20DET engines in the Silvia S13, S14, and S15.
At Terra Firma Automotive, we supply this genuine Tomei N2 Oil Block as a critical reliability component for SR20 builds. It is especially valuable on cars running oil coolers or sandwich plates, where additional stress is placed on the oiling system. By replacing the fragile factory block with Tomei’s reinforced design, you gain both improved durability and convenient sensor provisions. Protect your SR20 investment with this proven upgrade available from Terra Firma Automotive.
- Genuine Tomei N2 Oil Block
- Part Number: TB206A-NS08A
- Designed for RWD Nissan SR20DET (Silvia S13 / S14 / S15)
- Solves known factory oil block / sensor screw failure
- High-tensile aluminum construction
- Lightweight revised design
- Gold anodized finish
- #10 oil inlet and outlet ports
- PT1/8 ports for OEM-style oil pressure sensor
- PT1/8 ports for OEM-style oil temperature sensor
- Ideal for use with oil coolers or sandwich plates
- Critical reliability upgrade to prevent oil pressure loss
- Originally developed from Tomei’s N2 racing experience
- Revived by popular demand with improved design
- Available from Terra Firma Automotive
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