Z4 2004-2006 2.5ltr


2004 – 2006 2.5 litre 6 cylinder (M54) Bmw Z4 (with electric power steering)

We guarantee you the best price on any Rotrex supercharger kit, even when including installation and custom tuning.

How can we guarantee this? Because we are the official Rotrex distributor for all of Australia and New Zealand, and have been so more than a decade. Due to our massive buying power with Rotrex we can obtain any supercharger kit cheaper than the competition, and can then pass this discount on to you, our customer.


Developed and manufactured in house by Bullet Cars utilising the C30-84 Rotrex Supercharger, this kit will transform your standard Z4 into an M3 beating machine! The power delivery from the Rotrex Supercharger is extremely smooth and feels like a factory installation. With a stealth installation and virtually silent operation, this kit will suit the owner who is looking for a discreet performance upgrade.


  • Incredibly Stealth Installation with virtually silent operation
  • Designed to suit an internally standard factory engine
  • 55% power increase with minimal boost pressure
  • Retains factory Air filter box for Cold Air Induction
  • Does not require fuel pump or injector upgrades

Parts Included

  • Rotrex C30-84 Supercharger @ 7psi
  • Rotrex Self contained Oiling system with Oil cooler
  • Bullet Supercharger CNC machined Mounting bracket with idler pulley setup
  • Bullet 6 Rib drive belt
  • Bullet Air to Air Intercooler
  • Bullet Aluminium Intercooler and Intake piping with silicon hoses and hose clamps
  • Bullet Auxiliary boost injector with mounting system
  • Bullet recirculating bypass valve
  • All high quality Fasteners and hoses required for Installation

Please note: This kit must be fitted in conjunction with an engine management solution






1-2 Days


  • XEDE piggyback ECU with 2 bar map sensor, dual map capability and base map
  • Custom dyno tuning
  • JBT Brake Upgrade

Dyno Sheet