so deleting the cats would actually make a significant power gain?
and if I do decide to remove the cats...I should do that before tuning with AA. so they can tune the software precisely and properly towards having better exhaust flow?
Is that correct?
2016 BMW X5d - Black Sapphire on Terra
2016 Range Rover HSE TD6-White on Ivory
2010 Audi R8 V10 Coupe 6MT-White on Red - gone but not forgotten