E-seris & R4 Question

[RUFIO]

Whats the differnce in proformance between the E-series or the r-4 system...are the two differnt pipes for two differnt kinds of powergains? And is the r-4 louder?

[sweet300ex]

i am not sure about performance difference but i know the r-4 is louder

[NoWingNoPrayer]

Alright i think i might be the only person on this site with both pipes lol..

E sieres- 0.1 mre Hp than R4, Quieter(i cant tell, just is a different sound), adjustable and is Oval

R4 - Quicker Reving, Lighter, Round.

Both are overall performers. Esieres is better in the midrange and top, but R4 has a better over all power increase.

[northeast400]

I have both and disagree, I think my e-series gave more all around power, the R4 fellof 6000rpms, I run the E-series with 18 disc and seems to be a great setup for New England area, plenty of off idle power