Just wanted to know peoples thoughts on header design. I am after an aftermarket set of headers for my Mk3 but other than the options in Japan and US the only other option I have is the IL Motorsport headers but mx5parts only have the 4-2-1 in stock. And they seem to be a great price!
Most of the others I have seen in the US from Good-Win-Racing, Racing Beat and Corksport etc etc all use a similar 4-1 design like this:
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The only ones I can get in the UK (as far as I know) are these:
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They seem a similar design to the standard headers but better flow and without the CAT:
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Will that IL 4-2-1 give me more power but with characteristics same as the standard? From what I understand the 4-1 will give better scavenging and better power at high revs where as the 4-2-1 gives better mid range power and torque?
I am also getting the supercharger fitted in Feb so do I wait out and see if anyone designes a header designed to get the most out of this? Would a 4-1 or 4-2-1 be better for a supercharged engine? Good-win-Racing in the US say they are not making another header as they think the current one is good enough to get good gains with the supercharger.
Just wanted to share some thoughts of mine and see what you say as I keep coming close to buying some headers and then am not sure what to do!
I am not fussed about missing the CAT as there is another CAT in the mid section and I will extend the O2 leads and relocate the sensors if I need to or use the SIM provided with the IL Headers. I am more interested in which ones will give me the best performance gains.
And lastly the car will be just used as a daily driver with some B road fun at weekends and maye a track day if I am ever brave enough to take my pride and joy on the track.
Thanks.
Most of the others I have seen in the US from Good-Win-Racing, Racing Beat and Corksport etc etc all use a similar 4-1 design like this:
The only ones I can get in the UK (as far as I know) are these:
They seem a similar design to the standard headers but better flow and without the CAT:
Will that IL 4-2-1 give me more power but with characteristics same as the standard? From what I understand the 4-1 will give better scavenging and better power at high revs where as the 4-2-1 gives better mid range power and torque?
I am also getting the supercharger fitted in Feb so do I wait out and see if anyone designes a header designed to get the most out of this? Would a 4-1 or 4-2-1 be better for a supercharged engine? Good-win-Racing in the US say they are not making another header as they think the current one is good enough to get good gains with the supercharger.
Just wanted to share some thoughts of mine and see what you say as I keep coming close to buying some headers and then am not sure what to do!
I am not fussed about missing the CAT as there is another CAT in the mid section and I will extend the O2 leads and relocate the sensors if I need to or use the SIM provided with the IL Headers. I am more interested in which ones will give me the best performance gains.
And lastly the car will be just used as a daily driver with some B road fun at weekends and maye a track day if I am ever brave enough to take my pride and joy on the track.
Thanks.
