My (manual) WRX has godspeed uppipe and stromung downpipe, my friends WRX (manual) has turbo XS blowoff valve and STI exhaust. 1st gear we were dead even, 2nd gear i started pulling, by the end of 2nd gear i was pulling pretty well, shift into third, and i was pulling HARD. We went to 100 mph, and i was 4 good sized cars ahead. My friend then raced a mildly modded SSEI, he said all he had done was Pulleys, he showed us the time slips and he ran 15 second flat 1/4 at around 92 mph. Regardless, this SSEI started pulling on my friends REX after 80, and by 100 he was a car ahead. So then i raced the SSEI and i was a good 3-4 cars ahead by 100, and this was with a boggy start. All in all, im very IMPRESSED by the performance i got from the Downpipe and Uppipe, i also have a MBC sitting on my desk, im just waiting for the gauges, then its time for even MORE ass kicking...hehe . After i raced, i felt so bad, cause i usually baby my car, so i gave him a car wash, and shifted at 2500 all the way home, poor thing :P. Anyways, i was pleased with how i did, but i will be more pleased after i put in the MBC.