Just thought i would let everyone know i finally have a really great solution for the fuel pumps on our cars (R53/R56) I worked with Deatschwerks to find this solution and to guarantee a properly tested product. the new fuel pump moves much more fuel, this is key in a high performance situation as to not starve the motor for fuel. When should you upgrade the fuel pump? Id say if you have over 75k or have larger injectors its never a bad decision to add some more pump to back that up. With this pump kit its a direct drop in kit that will support up to 500hp. Also the pump is also fully E85 compatible and comes with 3 year no fault warranty. Ill also be providing the swap service for those local to me if need be and a full set of instructions as well as the option to buy a new tank to fuel pump assembly seal ( price to be determined but less than 8$ i think) If anyone has any other questions and cant get a hold of me on here my email is [email protected]