Garage99

This 2005 STi was brought in by a customer from Windsor. Due to the emissions testing done there, the car was equipped with a catted downpipe. An off-the-shelf Stage 2 map from Cobb was flashed into the ECU with a version 1 AccessPort, but I knew there would be room for improvement.


The parts:

• TurboXS catted downpipe
• TurboXS standard cat-back exhaust (2.5″)

The results:
253.4 hp @ 5200rpm and 294.7 ft-lbs @ 3700rpm


Compared to the Cobb map:



Compared to our stock ’06 baseline:

As I start to post dyno charts here, I’ve decided that I’m going to use a stock ’06 STi as my baseline for comparison when a more appropriate baseline for the car in question is not available. Why? …mainly because an STi is a car that is accessible and many people are familiar with the feel of acceleration in an STi.

So, without further adieu… here it is:

You can also see that I’ve added dyno charts to the previous posts.

This car belongs to Jan (say it with me, “Yahn”). While there are some big plans for this car in the future, it currently serves duty as Jan’s fun daily driver.


The parts:

• Crucial uppipe
• Titek downpipe
• Greddy exhaust with muffler delete
• Samco turbo inlet
• K&N Typhoon short-ram intake
• STi TMIC
• 3-port boost control solenoid

The results:
213.8 hp @ 5500rpm and 235 ft-lbs @ 3750rpm

As compared to our stock 2006 STi baseline:

The parts:

• Turbo XS uppipe
• HKS downpipe – new bellmouth design
• Vibrant catback exhaust
• 3-port boost control solenoid

The good:

• The mechanical work was done by Jan and Angel
• The car was CLEAN

The bad:

• I don’t think the uppipe did anything. It may have even slightly hurt spool-up.
• I’d recommend a fuel pump

The results:
261.7 hp @ 5000rpm and 300.8 ft-lbs @ 3750rpm

Very typical numbers for a stage 2 STi.

Compared to our baseline stock 2006 STi: