Sorry my previous response cut off a bit. I've installed my Intake, MAF, Throttle body, Strut Tower Brace & Camber plates all myself & saved $$. I even went a different route for the engine software and installed a powerchip program instead. PC is great to work with & sent me the cable set, step by step instructions then I uploaded the program from my laptop in about 30 minutes. It is the exact same process the Dinan distributors do as I added the stage 4 Dinan trans software 3 weeks ago & watched the Dinan distributor do it. Just to note - If you have the $$ I'd go with an ESS Supercharger before doing a Dinan S2 package or otherwise. I have seen an 02 4.6 with the ESS unit first hand (Nice package) & it blows my S2 off the map. It has the identical Vortec supercharger as the $11,000 Dinan S3 kit for $8400. I'm a tightwad but I'm saving my pennies for one myself.