GRB STI Stage 2 Big Turbo Build

Full turbo upgrade with FMIC and E85 support for 420+ whp.

Subaru WRX STI400–450 hp target~23h total install8 parts

Build Steps

Parts List & Install Order

Required Parts · 5

1
Blouch Blouch Dominator 2.0 XT-R (EJ257)
Advanced8h install+40–90 hp4.7
Turbo
$1,799.00
from 2 suppliers
Buy
2
Perrin Perrin Front Mount Intercooler (STI)
Advanced6h install04.6
FMIC
$1,299.00
from 2 suppliers
Buy
3
Injector Dynamics Injector Dynamics 1000cc (EJ257)
Intermediate2h install04.8
Injectors
$699.00
from 2 suppliers
Buy
4
Cobb Cobb Accessport V3 (STI)
Easy0.5h install+10–30 hp4.8
Tune
$721.07
from 2 suppliers
Buy
5
ACT ACT Heavy Duty Clutch (EJ257)
Advanced6h install04.4
Clutch
$595.06
from 2 suppliers
Buy

Optional Upgrades · 3

96
Enkei RPF1 17x9 +35 Wheel
×4
4.9
Set of 4 lightweight forged wheels
$1,380.00
from 2 suppliers
Buy
98
Mishimoto Compact Baffled Oil Catch Can
4.6
Keeps intake clean on turbo builds
$112.75
from 34 suppliers
Buy
99
AEM X-Series Wideband UEGO AFR Gauge
4.8
Essential for tuning; mount in A-pillar pod
$199.99
from 2 suppliers
Buy

Cost Summary

Required parts (5)$5,113.13

Optional upgrades (3)+$1,692.74

Total (best prices)$6,805.87

Prices from lowest available supplier. Does not include shipping or labor.

Research Sources

Community Attribution

subie_hatch

NASIOC

GRB hatch build for time attack events with detailed dyno results

View original build thread

Community builds are sourced from public forums and social media. Parts lists may have been adapted for clarity. Always verify compatibility before purchasing.

Next: plan the move

The details matter on the trailer, too.

Changes to ride height, wheels, bodywork or controls affect more than the build. Carry those details into the conversation about loading and transport.

Read the modified-car shipping guide Build a shipping brief See the whole journey