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Nissan RB26 Billet Block

The Bullet RB26 to suit Nissan RB26 applications has been proven in World Time Attack competition.

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Full specifications

The Bullet RB26 to suit Nissan RB26 applications has been proven in World Time Attack competition.

This product has vastly improved block rigidity and improved deck thickness over the stock unit. Combined with increased head stud diameter this product delivers exceptional head sealing qualities. Distortion of cylinder bores and crank tunnel is dramatically reduced through design improvements and a Bullet 4 bolt main cap system.

This product offers significant weight savings and has minimal modifications to directly replace the standard block.

the bullet difference
member resource
Name of product RB26 (Nissan RB26)
Actual Weight 40kg
Block Material 6061 aircraft grade billet aluminium.
Design improvements 4 bolt mains, increased block deck and cylinder wall thickness. Performance sleeves fitted
Studs included 1/2” Head and 7/16” Main
Modifications required to fit Remote Oil Filter Kit
Modifications to head required Drill out head stud holes to 14mm
HP rating 1800*
Significant benefits Weight saving, significantly increased rigidity and durability. May be bored to 89mm
Finish Raw machined
Options available Bullet Fire Ring Head Sealing System Wet or Dry Deck available
Stock block weight in comparison 70kg (N1)

the bullet difference

head sealing

The optional Bullet Fire Ring head sealing system uses a metallic gasket with grooved brass rings for the cylinders that provide exceptional head sealing under ultra high loads.


Increased deck thickness increases rigidity and stability for better head gasket sealing.


Bullet supply premium studs and block plugs with all billet blocks.


Our blocks are machined from 6061 aircraft-grade billet aluminium, so they are much lighter than cast iron alternatives. Typical weight savings are more than 20kg.


Our unique design incorporates siamese bores, dry sleeves and a one-piece cradle resulting in maximum rigidity. Cylinders stay round and piston rings seal better under high load resulting in more power.

4 bolt mains

Four bolt, billet one piece main cradle improves bottom and rigidity to reduce main tunnel deflection under extreme load. The cradle is made from the same material to ensure equal expansion rates and maintain a  round bearing housing at different temperatures.


Bullet’s registered designs are developed to identify and eliminte structural weaknesses in OEM blocks. They are built to exceptionally precise tolerances for exceptional results.


Cooling system design improvements and efficient fluid paths are a significant feature of the Bullet block.

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