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RBx Drag Extreme Billet Block

The Bullet Billet RB30 Drag Extreme (RBx) has been designed to suit Nissan Drag Racing applications capable of producing in excess of 3000hp.

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Full specifications

The Bullet Billet RB30 Drag Extreme (RBx) has been designed to suit Nissan Drag Racing applications capable of producing in excess of 3000hp.

This block removes the limitation imposed by the stock RB crankshaft design, with a custom Callies Ultra Billet crank that utilises the larger main bearing size of the Toyota 2JZ. This enables Nissan racers to have the benefit of a Crankshaft design more suited to the high output longer stroke combos.

This product has vastly improved block rigidity and improved deck thickness over the stock unit. Combined with ARP 2000 series ½” head studs 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 cradle system. This product offers new potential for drag racers utilising the Nissan platform.

the bullet difference
member resource
Name of productRBx Drag Extreme Billet Block (Nissan RB applications)
Actual Weight46kg
Block Material6061 aircraft grade billet aluminium.
Design improvementsCustom bottom end and crank architecture, 4 bolt mains, increased block deck and cylinder wall thickness. Performance sleeves fitted.
Studs includedARP 8740 1/2” Head and 7/16” Main
Modifications required to fitDry sump required.
Modifications to head requiredDrill out head stud holes to 14mm
HP rating3000+*
Significant benefitsWeight saving, significantly increased rigidity and durability. May be bored to 89mm.
FinishRaw machined
Options availableBME rods & pistons, short or long motor builds. Bullet Fire Ring Head Sealing System. This block is only available in solid, drag-only configuration.
Stock block weight in comparison70kg

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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