We designed our inlet pipe for the 2008+ STI with two goals in mind. Our primary goal was to make the pipe strong enough to resist sucking shut on even the largest of turbochargers.
The other was to make the largest pipe that could fit in the narrow space available on turbocharged STI models. Why are we so concerned about strength? If your setup is stock, there is not much to worry about at all. But if you are running higher boost levels, or larger turbochargers, the turbo can literally suck the pipe shut and especially if you are still using the stock airbox. This situation is not only bad for power, but can literally destroy a turbocharger!
Is bigger better? Yes! If you are planning on making more power out of your turbocharged car, you need to flow more air, period. Bigger intercoolers, turbochargers, and exhaust systems will not work if you do not suck in enough air.
That is why we designed our inlet pipe so large. So even if you are running our big and beefy AVO550 turbocharger, you will not be let down before the air has even reached the turbocharger!
2008+ Subaru Impreza WRX STI
The AVO Turboworld Range of High Performance parts and accessories represents the highest level of innovative performance parts engineering. AVO Turboworld offers a 3 month conditional Warranty covering against faults caused by manufacturing defects. AVO Turboworld cannot extend this warranty coverage to any such non AVO Turboworld items such as engine and drivetrain parts.
AVO Turboworld Warranty Policy Procedure
For All Warranty Claims submit a claim for a AVO Turboworld product under this Warranty Policy, the customer must: (1) fully and accurately fill out the AVO Turboworld ; and (2) provide AVO Turboworld with a copy of an original sales receipt indicating that you are the original Purchaser of the AVO Turboworld Product for which the claim is being submitted. In addition, (3) Photos, if requested by AVO Turboworld, you must also send the AVO Turboworld Product for which a claim is being made, all transportation expenses prepaid, to AVO Turboworld.