the borla y-pipe for 95 z28's is it any good? i plan on buying this because its only 159.99 is that a good price for this y pipe? what would be the rundonw on the install of this? i know you have to weld it to the cat and unbolt it from the exhaust manifolds. also how hard is it and it claims it gains 8-10hp is this true? anyone else have it ever used it? i would like info. i plan on gettin this ypipe, a cutout, and a high fow cat soon sometime. i hope to make about another 15-20hp with it you think that much or just around 10-15 or so? tahnks let me knwo!