Tsudo 08-09 Subaru STi GR chassis turboback (08-09 STi quad-tip catback and 08-09 WRX/STi divorce wastegate downpipe) dyno test. Great gains over OEM equipment.
Test vehicle had only Crawford stage 1 reflash for both runs. Otherwise everything else was 100% stock for the base run (Stock intake, TMIC, downpipe, catback, etc).
+28.7whp / +37.0wtq gain with BOLT-ON Tsudo turoback exhaust and stock airbox and filter
NO TUNING, NO BOOST CONTROLLER, NO ECU FLASHING, AND NO GIMMICKS TO IMPROVE THE NUMBERS LIKE OTHER COMPANIES. 100% BOLT-ON TESTING
Dyno sheet attached. All numbers SAE corrected, 3 runs each, 6 runs total.
Run on Dynapack 4WD dyno at DRIFTSPEED in Los Alamitos, CA.
Dyno Video:
Base-line run with stock engine: 214.2whp / 247.1wtq
Tsudo turbo-back exhaust ONLY (no other modifications): 242.9whp (+28.7whp) / 284.1wtq (+37.0wtq)
Sound Clip:
DRIFTSPEED.COM