I love this intake manifold and heater delete all in one kit, I would put one on every cummins. I got the horn style without the EGR parts and it puts me at ease knowing I'm not going to be getting vaccum leaks at all the block off plates and have to deal with that pesky butterfly valve. This kit really woke up my truck, I wasn't expecting a whole lot of gains but they are definitely there. I run an aftermarket turbo setup, bigger injectors, fully deleted, straight piped (4" but want the 5"), custom tuned, cold air and manual swapped, so like I said I didn't feel it would make a difference but I felt the difference. Love this companies products and am looking to go with there sick valve cover and maybe there 5" exhaust before long.