I possess both. Right off the bat most would say the Prospeed, but where I'm from there isn't a place near by to get a tune after installing the Prospeed. So I purchased the Megan and made the collector mod but now I am contemplating which I should actually install. I'm not trying to have an all out built NA car. I want something with power when I need it though. The engine is internally stock with intake and clutch as of now and more then likely it will remain this setup for awhile.

so my question really is, how extremely important would it be to tune it after the Prospeed installation? I know it flows dramatically better so it will end up leaning out.





-edit- there is 2 versions of the Prospeed header one with 16G and 18G steal correct? Is there any way to tell from the physical appearance on the outside between the 2?

 

sorry i'm not sure about the answer but i think you'll be fine without a tune.

i am wondering where you got the prospeed though.

 

There's a Prospeed header for sale here locally, the guy wants $400 bucks.
I also think you'll be ok without tuning

 

yah I bought mine from a guy on Craigslist.

anyone else agree with the other 2 gentlemen about no-tuning?

 

why do you think you'd need to tune the prospeed but not the megan w/ a 2.5" collector? isn't the whole point to be flowing better? if it's not going to give you added performance, why are you putting it on there?

my advice would be to put on the prospeed and sell the megan. with the mods you have listed, i highly doubt you are in danger of running the motor too lean, if anything it will put you closer to mbt (mean best torque). use the money from the megan and buy a vafc and drive it somewhere to get it tuned if you want to take full advantage of the header.

 

after tune what are the anticipated gains comparatively?

 

so you want power and you are contemplating puttting an ebay header on over a custom piece?

 

yes, but with the only variable being no place near by to tune.