Reinforced cylinder head bolt kit (12.9) for 1.6/2.0 TDI Common Rail engines

DSD8936.1 - High-Strength Reinforced Cylinder Head Bolt Kit (12.9) - 1.6 & 2.0 TDI Common Rail

Secure your engine with the high-performance cylinder head bolt kit developed by Darkside Developments (Reference: DSD8936.1). Essential for any advanced car tuning or racing project, this kit compensates for the weaknesses of the original bolts when significantly increasing boost pressure.

Maximum Reliability for Stage 2 and Stage 3 Tuning

When increasing the power of a TDI Common Rail engine, cylinder pressures increase considerably.

The original cylinder head bolts can stretch, causing head gasket failures. The DSD8936.1 kit uses strength class 12.9 bolts (compared to 10.9 for the original), providing significantly greater tightening force.

These high-strength bolts ensure a perfect seal between the engine block and cylinder head, even under extreme turbo pressures.

These high-strength bolts maintain a perfect seal between the engine block and cylinder head, even under extreme turbo pressures.

Unlike more expensive cylinder head studs, these bolts offer excellent value for money for configurations up to approximately 300 horsepower.

Kit Technical Specifications:

Vehicle Compatibility Precise

This reinforced screw kit is compatible with almost all 1.6 TDI and 2.0 TDI Common Rail engines from the Volkswagen Group (Audi, VW, Seat, Skoda):

Compatible engine codes (non-exhaustive list): CAYB, CAYC, CAYA, CFFB, CFGB, CFGC, CFHA, CFHC, CJAA, CKRA, CRBC, CRMB, CUPA, CUNA, CRLB, DFGA, CUUA, etc.

Technical Note: Not compatible with older unit injector (PD) engines. This kit is strictly for Common Rail engines.

Darkside Developments Expertise for Your TDI

As a specialist dealer in diesel performance parts, we recommend using the DSD8936.1 kit when installing a hybrid turbo or aiming for an aggressive Stage 2 tune. This ensures reliable mechanics that won't let you down during track sessions or intensive use. Installation Tip: We recommend using the original tightening torque when installing these screws, ensuring that the screw holes in the block are clean and free of oil or coolant to prevent hydraulic damage.

• Strength Class: High-tensile steel Grade 12.9.
• Compatibility: 1.6 and 2.0 TDI Common Rail engines (VAG).
• Tightening Force: Higher than OEM bolts to prevent cylinder head lift.
• Installation: Direct replacement of the original bolts (specific tightening torque recommended).
• Includes: Complete set of 10 bolts for one engine.
  • Volkswagen: Golf Mk6, Golf Mk7, Passat, Polo, Scirocco, Tiguan, Touran, Transporter T5/T6.
  • Audi: A1, A3 (8P/8V), A4 (B8/B9), A5, A6, Q3, Q5, TT.
  • Seat: Leon (1P/5F), Ibiza, Altea, Exeo, Alhambra.
  • Skoda: Octavia (1Z/5E), Fabia, Superb, Yeti.