Garrett GBC20-300 Boost Club Turbocharger

Original price was: £639.95.Current price is: £613.72. inc. VAT


1 in stock|1 more overdue from supplier

New for 2021, Garrett’s boost club turbochargers are designed for small engine displacements including powersports, personal watercraft, and small automobiles. The turbos feature internally wastegated turbine housings and journal bearing rotating bearing housings. A forged, fully-machined compressor wheel that we estimate should make 260-280hp when strapped to the Mazda MX-5.

  • Integrated wastegate assembly with calibrated 0.5 bar actuator
  • Adjustable wastegate bracket for improved clocking angle
  • Billet compressor wheel with extended tip design for higher pressure ratio capability
  • GTX Gen II compressor aero with modern gasoline turbine wheel aero
  • Inconel turbine wheel material
  • Ductile iron (SiMo+) turbine housing material
  • Latest generation of journal bearing rotor group
  • 360-degree thrust bearing
  • Oil-cooled centre housing
  • Boost signal port with installed plug
  • Designed to use existing 480009 actuators
  • Suitable for Kraken Top Mount and Low Mount Manifolds

Compressor Specs

Inducer size 39mm, Exducer size 52mm

Trim 57, A/R 0.59, Flow: 30 lbs/min

Turbine Specs

Inducer size 47mm, Exducer size 42mm

Trim 84, A/R 0.55, Inlet T25 4 Bolt, Outlet 5 Bolt

It is recommended to port the wastegate and the lead in to it to maximize the wastegate control for stock engines.

Additional information

Shipping Weight 7.3 kg
Shipping Dimensions 25 × 25 × 25 cm









Mk1 (89-98), Mk2 (98-05), Mk3 (05-15), Mk4 (15-24)

Warranty information

Warranties cover defects in materials and workmanship only. Warranty is for replacement of a similar product, repair of the original product or refund of the purchase value only and excludes all labour and incurred charges including towing, fitting, inconvenience, and purchases of other manufacturer's products. The warranty is good for the period stated in the additional info tab from the date of purchase. Mileage warranties are for road use only and proof of mileage is required. Products must be installed by an independent experienced professional mechanic and the suspected defect must be present at the outset. The warranty does not cover damage caused by incorrect installation, failure to comply with the maintenance requirements of the vehicle, processing or otherwise changing the product, ordinary wear and tear, or any other external influences. Warranties are invalid if the product is used for racing, rallying, drifting, track days or any other form of motorsport or competition. Please refer to the manufacturer's own warranty documentation for more information.

Making a warranty claim

Proof of purchase receipt showing the date of purchase, proof of mileage at installation, proof of current mileage and invoice of the work undertaken by an independent experienced professional mechanic must be supplied along with the returned products for a warranty claim to be considered. If your vehicle needs to be used whilst your warranty claim is considered replacement parts from the same manufacturer should be purchased through BOFI Racing. In the event of a successful warranty claim, we will refund the card that was originally used to purchase the replacement parts, in full or in part depending on the nature of the claim. BOFI Racing reserves the right to make full or partial compensation at its sole discretion depending on the condition and mileage use of the returned suspect parts. For example, if you have used the part for several thousand miles before a defect is noticed, only partial compensation may be offered.

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