Pacemaker 4480s

Hey guys tried searching on my piece if shit phone but cones up with no results. Just wondering how good the pacey comp extractors are?
http://www.boostedfalcon.net/
http://www.boostedfalcon.net/viewtopic.php?f=2&t=23579
.tapeworm wrote:If you have a cam/tune etc. they might be worth it, but on a stock engine there is no difference in daily driving. There is more punch after 3000rpm but that's not really usefull. Just my expereince.