The Bullet RB30Sx (Street Extreme) to suit Nissan RB bolt-up applications is the same as our regular RB30 Billet Block but with a larger main tunnel to accept our larger main bearing custom crankshafts. It has been designed to suit applications producing 2500hp+.
The addition of the larger main shaft increases the strength of the crankshaft and remedies the under engineered RB30 OEM sized crankshaft problems in the high output applications. The large main shaft crankshafts are available in two strokes 90mm & 94.5mm. Capacities up to 3.6 litres can be achieved using the RB30Sx.
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 delivers scope to create large displacement RB engines.
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.
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.