Just like it sounds. Pumps, inj, rails?

 

450-475 rwhp you're close to the edge in my opinion. A BAP takes you to 500 rwhp and at that point injectors, pumps are really needed.

Jody

 

I see the stock 42s maxed about 450rwhp. Pumps, I'd change over about 450-475rwhp. Rails are good for about 650rwhp. Of course, these are just general suggestions, the actual truck combo can raise or lower the ratings (i.e. nitrous use, etc).

 

Call me crazy, but pumps as soon as you buy your L and injectors - well - I max'd mine at 496/562 with a KB. I was flirting with a 12.6 a/f and my tuner, whom I respect said new injectors and I would have been in the 510/520 hp range (but then again with a stock block I wasn't willing to push it that far). As far as rails go? That is a great question!

D-Day