Legendex "BT50/DMAX" Big Boy Intercooler

BT50 or Isuzu D-MAX: 2021 - 2022

The Legendex Big Boy intercoolers are for the serious off-roader wanting the best from their 4WD turbo diesel engine.


Cool Under Pressure Move over kiddies - the Big Boys are here! Big, new, man-size plumbing so even the hardest working bloke (and his 4WD) can stay cool under pressure.

At 48% cooler charge air temperatures than stock, you get up to 3 times more efficient cooling (results will vary between vehicles). That means better performance for towing, off-road and hillclimbs.

A more efficient engine means better fuel economy and longer engine life.

  • Low restriction straight through integrated internal fin design
  • Light weight with leading edge wall thickness for strength
  • Core thicknesses of up to 146mm using 42, 55, 68 & 81mm tube combinations
  • Revolutionary fin pitch from 10-22FPI and louver angles
  • World class TIG welding by our passionate fabricators
  • State of the art controlled atmosphere brazing process
  • All items CAD designed to meet ISO9001 International standards for repeatability
  • Race and street proven performance backed by comprehensive wind tunnel testing
  • Pressure tested and guaranteed
  • 100% Australian made


  • Direct fit no cutting required
  • Tube and Fin
  • 68mm Core
  • Mandrel Bent Pipes
  • High Quality Silicone Hose
  • Murray Constant Tension Clamps
  • Billet Outlets


  • 1 x High Performance Intercooler
  • 1 x Fitting Kit
  • 1 x Hard Pipe Kit with Silicone Joiners and Clamps


•ISUZU D-Max and MAZDA BT-50 3.0L Turbo Engine (2020 - Present)


Shipping Weight 56.0000kg
Shipping Width 0.210m
Shipping Height 0.510m
Shipping Length 1.100m
Shipping Cubic 0.117810000m3

Be The First To Review This Product!

Help other Genie Performance Exhaust P/L users shop smarter by writing reviews for products you have purchased.

Write a product review

Others Also Bought

More From This Category