Ek9 header worth repalcing?

[simon_32]

After some research, I’ve discovered the stock EK9 header has a 2.5” (63.5mm) collector which I was unaware of. Is it beneficial replacing it for a s/steel true 2.5” design with either a 4-2-1 or 4-1 set up, or is it just a waste of cash?

 

[joe]

The collector maybe 2.5' but the internal diameter of the primary tubes are not, an aftermarket header will be beneficial.

 

[simon_32]

Is the £ to bhp worth it tho?

 

[Scottek]

Depends what you would call worth it. I changed mine over for a Mugen 4-1 with a decat and it felt less restrictive and smoother but the power gains won't be much off changing the manifold alone if anything. Especially without getting it tuned.

 

[simon_32]

What diameter piping does your's have Scott? and what gains if any did you see on the dyno?

 

[natune]

i think the weight advantage alone is worth it, the oem cast section weighs an absoloute tonne!!

 

[Tegiwa Imports]

i think the weight advantage alone is worth it, the oem cast section weighs an absoloute tonne!!

You'll gain 5bhp minimum with a decent header, you'll also save around 6kg which is a great saving

Ours is worth a look, we would even take yours in p/x

Thanks

 

[elchunk]

only really worth replacing with a 98 spec ITR mani (best bang for your buck)or a very good aftermarket mani with good sized primaries and a true 2.5" internal dia collector. otherwise i'd spend your pennies on refreshing your suspension and upgrading that, as thats where you'll notice your money the most.

 

[Scottek]

What diameter piping does your's have Scott? and what gains if any did you see on the dyno?

Mine was a 2.25' but I never had my car dynod before it was fitted. However, when I was running the mani, decat, cat back and induction kit the car made 185bhp. I then had it tuned which put it up to 197bhp with a Hondata. But that isn't cheap.

Those figures were from TDi north so are high but you can see the gains there.