Back to Subaru WRX STI

Stage 1

GDB STI Stage 1 Street Build

Accessport tune, intake, downpipe, and catback. Safe 320-350whp on pump gas.

Subaru WRX STI (GDB)320–350 hp target

Parts List (7 components)

Required Parts (4)

#1Cobb Cobb Accessport V3 (STI)

4.8Easy+10–30 hp

Tune

$721.07

from 2 suppliers

#2Cobb Cobb SF Intake System (STI)

4.5Easy+5–10 hp

Intake

$265.44

from 2 suppliers

#3Invidia Invidia Catted Downpipe (STI)

4.5Intermediate+20–35 hp

Downpipe

$399.00

from 2 suppliers

#4Invidia Invidia Q300 Catback (STI)

4.6Moderate+8–12 hp

Catback

$1,099.00

from 2 suppliers

Optional Upgrades (3)

#5BC Racing BC Racing BR Coilovers (GDB STI)

4.6Intermediate0

Coilovers

$1,092.48

from 2 suppliers

#97Defi Advance BF Boost Gauge 60mm

4.7

Monitor boost pressure

$155.63

from 9 suppliers

#98Mishimoto Compact Baffled Oil Catch Can

4.6

Keeps intake clean on turbo builds

$112.75

from 34 suppliers

Cost Summary

Required parts (4)$2,484.51

Optional upgrades (3)+$1,360.86

Total (best prices)$3,845.37

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

Community Attribution

STI_daily_build

NASIOC

Reliable daily STI build with smart power mods and supporting upgrades

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.