Would these effect a car with a custom remap?I got mine second hand, mine is the V2, but V3 info is here:
https://www.sprintboostersales.com/
http://www.ebay.co.uk/itm/Sprint-Booster-V3-for-Renault-Clio-II-to-2005-PN-BLK-REV3-01/182498929648?_trksid=p2047675.c100011.m1850&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=40656&meid=19b37c08e4854888a8c6f7143756005c&pid=100011&rk=1&rkt=12&sd=261012243272
(I got mine second hand, so not sure who is cheapest).