Are they spendy? I just might want one of those if they are not too difficult to install, unlike my Apexi AVCR boost controller. I hate losing to slower cars due to wheelspin. There's this modified mustang that beats me off the line so bad everytime that it's too late to catch him before the 1/4 is up. I always gain on him, but more horsepower means nothing in situations like that. I may try the BF Goodrich street legal drag radials next.