Crankshaft Seal with Billet Upgraded Sealing Flange | Pre-2008 4-Cyl | VELT-KIT-0006

Velt Sport Billet Rear Main Seal Upgrade – VW/Audi 1.8T and 2.0T Engines

If you are experiencing oil leaks from the bottom of the bell housing or a slipping clutch, there is a high chance the factory rear main seal has failed. The OEM plastic housing design is known to warp, crack, and leak over time, especially on tuned engines. Replacing it with another factory seal often leads to the same problem again.

The Velt Sport Billet Rear Main Seal is a performance-focused solution designed to eliminate the weaknesses of the stock component. This upgraded design features a CNC-machined aluminum housing and a spring-loaded crankshaft seal to provide consistent sealing, proper crankshaft tolerance, and long-term durability.

Engineered to Last

Unlike the factory molded plastic seal, this billet rear main seal maintains shape and sealing pressure even under heat, crankcase pressure, and aggressive driving conditions. It is suitable for stock, modified, and high-boost applications and is trusted by performance shops, installers, and enthusiasts worldwide.

Key Features:

• Fixes common oil leak issues found on VW and Audi turbo engines
• Eliminates failure-prone OEM plastic rear main seal
• CNC-machined aluminum housing for strength and precision
• Spring-loaded seal ensures consistent long-term sealing
• Ideal for stock, tuned, and high-boost builds
• Direct replacement installation

OEM Replacement Reference Numbers:

• 026103171A
• 034103171A
• 06A103171A

Fitment Note: Not compatible with the 2.0 TDI engine that uses the integrated impulse wheel (OEM part number 03L103171A).

Replace your leaking factory seal once and do it right. The Velt Sport Billet Rear Main Seal is the long-term solution your build deserves.

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