Shane@DBPerformance
08-31-2006, 03:01 PM
The 255HP is better at handling higher pressures. Fuel pressure goes up with boost, so on a high boost car the 255HP helps a lot. At 0psi and below they pretty much flow the same, so on an car that isn't boosted and runs a normal fuel pressure of 43psi, there is pretty much no difference between the two.