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:

Check out our dyno video and soundclip below!

Tsudo 08-09 Mitsubishi Evolution X catback with test-pipe exhaust dyno test. HUGE performance gain over OEM.

Test vehicle was 100% stock with no modifications.

+63.0whp / +12.6wtq gain with BOLT-ON Tsudo exhaust with BONE STOCK airbox!

+76.9whp / +45.2wtq gain with BOLT-ON Tsudo exhaust and stock airbox with cone filter!

NO TUNING, NO BOOST CONTROLLER, NO ECU FLASHING, AND NO GIMMICKS TO IMPROVE THE NUMBERS LIKE OTHER COMPANIES. 100% BOLT-ON TESTING

Dyno sheets attached. All numbers SAE corrected, 3 runs for each modification, 9 runs total.

Run on Dynapack 4WD dyno at DRIFTSPEED in Los Alamitos, CA.

Dyno Video:

Base-line run with stock engine: 236.0whp / 247.9wtq

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Tsudo exhaust ONLY (stock intake): 299.0whp (+63.0whp) / 260.5wtq (+12.6wtq)

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Tsudo exhaust (stock airbox with cone filter): 312.9whp (+76.9whp) / 293.1wtq (+45.2wtq)

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Comparison between stock airbox and cone filter WITH Tsudo exhaust (different runs than shown above)
The difference between runs is less than 1 horsepower or 1 lb/ft torque when using the very repeatable Dynapack dyno

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Sound Clip: