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Honda B Series Billet Block.

The Bullet B series to suit all Honda B Series applications has been engineered to deliver reliability in 1700hp environments.

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Full specifications

The Bullet B series to suit all Honda B Series applications has been engineered to deliver reliability in 1700hp environments.

This product has vastly improved block rigidity and improved deck thickness over the stock unit. Distortion of cylinder bores and crank tunnel is dramatically reduced through increased material thickness and a Bullet 4 bolt main cap system.

This product requires minimal modifications to directly replace the standard block.

The Bullet Honda B series comes in 3 models, Wet or Dry Deck (open or closed deck) with water jackets & a Solid Drag only version.

So Street-Strip-Circuit-Bullet has you covered!

the bullet difference
member resource
Name of productHonda B Series (suits all B series applications)
Actual Weight36kg
Block Material6061 aircraft grade billet aluminium
Design improvements4 bolt mains, increased block deck and cylinder wall thickness. Ductile Iron performance sleeves fitted
Studs includedARP 8740 1/2” Head and 7/16” Main studs.
Modifications required to fitRemote Oil Filter required, external oil pump & water inlet pipe modification.
Modifications to head requiredDrill out head stud holes to 14mm
HP rating1700*
Significant benefitsSignificantly increased rigidity and durability. May be bored to 85mm & fully repairable.
FinishRaw machined
Options availableBullet Fire Ring Head Sealing System Wet deck, Dry deck and Solid Block options

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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