what do you think about this "exhaust" for the 2010 hemi ram 1500?

i write from italy, my english isn't good sometimes

 

Your english is fine ----- I wish I could speak Italian as well as you speak english!

 

http://www.tundraheadquarters.com/bl...haust-cutouts/

Only article I could find.

I have a question for you race experts only. Back in the old days before cats and aluminum heads; the rule of thumb was that open pipes, which reduced backflow, added HP and torque ONLY above 5,000rpm.

Does that thumb rule apply nowadays? I read somewhere that the aluminum heads dissipate heat so much quicker than cast iron that some back pressure is desired for peak performance. (keeps head temp, combustion chamber at optimum)

 

Ahah thanks so much

Thanks Dakotaho for your link i have read but the article talk about QTP for thundra, is the same for dodge ram 2009-2010??