Here is mine home-made CAI . All pipes are at 60mm . The heatshield is made of italbond,its sandwich of 2 peaces of aluminium and hard rubber. At the top of the heatshield i put a ruuber from the back trunk of renault 19 , and inside the heatshielded space ,there is a pipe wich goes to front bumper for fresh air. The sound is great!
