IM WANTING TO GET MORE AIR OUT... SHOULD I GO 4-2-1 OR 4-1... WHICH IS LESS RESTRICTIVE... OR IS IT A PREFERENCE THING.... DOES IT MAKE IT RUN DIFFERNT DEPENDING ON WHICH I GET??? [IMG][/IMG]

 

there wont be much of a difference between the two on a stock honda engine. general consensus is that 4-2-1 gives you low-mid range power and 4-1 gives you top end. i myself prefer 4-1

 

both are less resrictive than stock but dont differ to much from eachother in that sence. 4-2-1 is better for low end power and 4-1 is better high end, 4-1 i hear is a popular choice for drag racing...DC Sports is a popular choice on here...

 

^ what he said. dc sports is a good company..but also look into megan racing..they are cheaper and from what ive heard, are not a bad company at all. before you fork out money on i/h/e, think about your goals up ahead and if its worth puttings the money in2 your d series.

 

I bought a 4-1 on ebay. You definetely notice the power difference.