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TGA Performance - Subaru Stages Modification Guide


719.271.9654

sales@tgaperformance.com


At TGA, we would love to help you make smart decisions on modifying your vehicle. Useless parts are sold non-stop, so these guides are just suggestions based on our past experiences. This is not supposed to be an exclusive list, but more of a great base for a continuously modified vehicle.

First off, do your research whenever you modify your car from OEM specifications. Make a plan for the future of your vehicle, talk with your installer BEFORE you start purchasing parts, and understand most aftermarket parts do not mate well with other brands. Here are some of our suggested modifications for certain stages; Feel free to make suggestions as this should be an ongoing list. Anything past Stage 2, you want to start looking for a backup source of transportation. A highly modified Subaru requires constant monitoring, just like any race car.

Contact us today to discuss modifications and engine builds!

View our engine build pricing down below!


Stage 1

Tuner, intake, catback, mild suspension

TGA recommendations:


  • Cobb Accessport
  • Catback exhaust
  • Short Shifter/ shifter bushings
  • Steering rack bushings
  • Subframe lock down bolts (02-07)
  • Anti-lift kit
  • Wheel/ tire upgrades for summer/winter use
  • Exterior accessories
  • A habit of checking your oil levels at every gas tank!

Stage 2 (270-350hp)

Stage 1 + turbo back exhaust, adjustable suspension, cooling system, oil system

TGA recommendations:


  • Downpipe
  • Sway bars and endlinks
  • Subframe bushings (08+)
  • Stage 2 off the shelf map
  • Air/Oil seperator
  • Heat shielding (downpipe/turbo)
  • High quality oil
  • Spring/ Strut upgrades
  • Brake pad/rotor/fluid upgrades
  • High Performance driving lessons
  • A helmet for track use (SA2010+)
  • Driving apparel (shoes/ gloves)
  • Spark plug upgrade

Stage 2+ (350- 450hp)

Stage 2 + E85, turbo, fuel pump, injectors, clutch, pistons, EWG

TGA recommendations:


  • GET A DAILY DRIVER!
  • E85 conversion (fuel pump, injectors, tune)
  • Clutch upgrade
  • Forged pistons
  • External Wastegate
  • Headers
  • Aggressive suspension (fully adjustable suspension)
  • Racing brake pads, rotors
  • Track use only tires/wheels
  • Safety equipment (cage, racing seat belts, etc...)
  • Aluminum radiator
  • Electronic boost controller
  • Top mount or front mount intercooler upgrade
  • Weight reduction
  • Gauge monitoring (AFR, Oil PSI/ Temp, Boost)

Stage 3 or higher (450hp+)

Stage 2 + larger turbo,  drive train, suspension

TGA recommendations:


  • Engine rods, pistons, camshafts, valves
  • Blueprinted custom engine
  • Bore Sleeves
  • Larger turbo 25psi+
  • Coilover suspension
  • Race spec cage/ safety gear
  • Aero additions
  • Engine/drivetrain mounts
  • Racing school
  • Tow rig/ trailer

TGA Performance Engine Builds

Contact us for a custom build or rebuild today!

OEM Rebuild WRX/STI 300hp

•    12K/ 12 month warranty parts/labor
•    EJ257 OE short block
•    Head machine work
      (decked, oil gallies flushed, valve lapping, seals
•    Complete engine gasket set
•    New timing belt kit
     (belt, water pump, tensioner, idlers)
•    New OE oil cooler and oil pump
•    New oil pan, baffle, and pickup
•    New spark plugs, coolant, head bolts
•    Pre-paid break in oil changes to 1500 miles (5 total)

Starting at $6,499 Parts and Labor

Stage 1 IAG WRX/STI 400hp

•    All of OEM rebuild
•    Must have Stage 2 basics
•    2 year/ 24K workmanship warranty
•    Custom JE Pistons with Pro seal HG
•    ARP head studs
•    Killer B Baffle/ Pickup
•    IAG AOS

Starting at $9,499 Parts and Labor

Stage 3 Closed Deck IAG WRX/STI 450-550+hp

•    All of Stage 2 rebuild
•    Must have Stage 3 basics
•    2 Year/ 24K workmanship warranty
•    Closed deck IAG block with forged pistons & rods
•    1000cc injectors/ Fuel Pump/ FPR
•    Upgraded TMIC/FMIC, IAG AOS

Starting at $14,299 Parts and Labor

FA20 OEM Rebuild BRZ/WRX 300hp

•    12k/ 12 month warranty parts/ labor
•    FA20/FB20 OE short block
•    Head machine work
     (decked, oil gallies flushed, valve lapping/seals
•    Complete engine gasket set
•    New OE oil cooler
•    New timing chain kit
     (guides, water pump, tensioner, idlers)
•    New OE oil pump/ Timing cover
•    New OE oil control items
     (AVCS, scavenge pump, solenoids)
•    Spark plugs, coolant, head bolts
•    Pre-paid break in oil changes to 1500 miles (5 total)

Starting at $9,499 Parts and Labor

FA20 IAG Stage 3 WRX 400hp+

•    All of FA20 OEM Rebuild
•    Must have Stage 2 basics
•    2 year/ 24K workmanship warranty
•    Stage 3 IAG short block
•    Upgraded turbo
     (Port and Polish or center cartridge)
•    Cobb Flex fuel/ IAG AOS

Starting at $15,499 Parts and Labor

Additional Items to be considered:

•    Wear and tear items (clutch, hoses, belts, fluids)
•    Custom dyno tune
•    Suspension/ mount upgrades
•    Custom fuel lines/ rails/ surge tank
•    Safety equipment (roll cage/ gear)
•    Brake upgrades
•    Transmission upgrades
•    Monitoring devices (gauges, standalone, fail safe)