GrimmSpeed CHASE JB400 Turbocharger Kit Subaru WRX FXT LGT 2002-2014

The focus of this project was to offer a stock location OE replacement turbo, which when paired with GrimmSpeed supporting mods, allows enthusiasts to take full advantage of their EJ series turbo engine.

Both of our new turbocharger options feature state of the art proprietary compressors, turbines, CHRA's and wheel designs which maximize the power made on your EJ engine at two different price points. The overall design went through tedious gas flow test analysis, strenuous failure testing and engine pounding dyno/road testing, all to create the new standard for EJ engines: The GrimmSpeed Chase JB400 and Overtake BB500 Turbochargers!

The Chase JB400 Turbo is the smaller of our two offerings, this journal bearing unit is a perfect bolt-on to any stage 3 car, with which you are able to maximize the car's power potential with instant results through installation/tuning. The Chase JB400 features a robust 49lb compressor wheel, with a 53mm turbine wheel to offer quick response and power in the mid-range where you need it. The Chase Version was able to hit 440WHP and 460WTQ on The GrimmSpeed Stage 3-equipped 2020 STI with the addition of only tuning and fuel mods. The impressive bit is that the vehicle was able to hold over 400WTQ from 4150RPM, an RPM range where the stock turbo begins to lose power. Compared to a tuned stock turbo STI, the Chase 400 is able to produce 70 more horsepower and 66 more ft/lbs of torque.

Features:

Compressor Wheel Size (Inducer/Exducer): 51.2mm / 73.8mm Extended tip, 48 Trim
Turbine Wheel Size (Inducer/Exducer): 53.8mm / 47mm, 76 Trim
Compressor Flow: 49 lb-min
Compressor Inlet Diameter: 2.4''
Compressor Wheel Type Material/Alloy: Billet 2618
Compressor Housing Alloy: A356
Turbine Housing Alloy: D5S
Bearing Type: Journal
Compressor A/R: 0.65
Turbine A/R: 0.88
Adjustable Wastegate: Pre-set at 15Psi base pressure

Fitment:

Subaru STI 2004-2021
Subaru WRX 2002-2007
Subaru FXT/Baja 2004-2008
Subaru WRX/FXT 2008-2014
Subaru LGT/OBXT 2005-2009

Other Part Numbers:

GrimmSpeed #grm123005