US Headers & Exhausts NA

[Dupain]

What's the port and pipe diameter of each primary?

Pretty much the same.

[Dupain]

Giving it a wash with detergent, rinse, then clean with methylated spirits, once installed rinse with a bottle of vodka on first start up.

[Mr Morlock]

The welding looks very average to me. The whole thing looks like a nightmare. If it's too cheap then that's what it will be. If it does not fit bad luck. Detergent meths vodka Yeah that will make the difference.

[gslender]

I don't know, I think after enough Vodka I could be convinced it's worth putting on the car.... Maybe just for laughs, you know, just like how slammin looks cool and stuff. Stupid in terms of what it does to performance and handling, but some folks think it looks wicked. I just see stupid.

[Regie]

equal length runners aye??

[Dupain]

I don't know, I think after enough Vodka I could be convinced it's worth putting on the car.... Maybe just for laughs, you know, just like how slammin looks cool and stuff. Stupid in terms of what it does to performance and handling, but some folks think it looks wicked. I just see stupid.

[StuwieP]

external diameter appears to change between welds? or is that just the photo/my eyes?

[markwid]

Agreed. Looks like a dog's breakfast, those unequal length runners.

If this is "tuned", it is done badly. I can't think of a good reason to deviate from what is tried and tested design for equal lengths.

For example, Xforce 4-2-1 design below showing how curls are used to achieve equal lengths.

The welding looks very average to me. The whole thing looks like a nightmare. If it's too cheap then that's what it will be. If it does not fit bad luck. Detergent meths vodka Yeah that will make the difference.

[hks_kansei]

What's the port and pipe diameter of each primary?

Pretty much the same.

So they aren't tuned then?

So you would expect the primary on cyl one to have a slightly smaller internal diameter to tune it to compensate for thevextra length.

I mean, I could see they weren't tuned right from page 1 of the thread, but even by your own unusual definition of tuned they aren't...

[Odd]

Agreed. Looks like a dog's breakfast, those unequal length runners.

If this is "tuned", it is done badly. I can't think of a good reason to deviate from what is tried and tested design for equal lengths.

For example, Xforce 4-2-1 design below showing how curls are used to achieve equal lengths.

The welding looks very average to me. The whole thing looks like a nightmare. If it's too cheap then that's what it will be. If it does not fit bad luck. Detergent meths vodka Yeah that will make the difference.

That's a very nice set of extractors....if the work half as well as they look they'd be brilliant

[sailaholic]

Hard to tell in the photo but the welds looks pretty average particularly the first weld after the flange one cyc 2.

Seems excessively curly given short the primary is still.


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[zero00]

hmmmm .. I'll take the potplant

[Dupain]

Have you thought about the firing sequence?

[plohl]

Yes.

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[Black_Penguin]

Wouldn't make a difference, the idea is to have the 'pulses' of exhaust gas enter the collector at equally separate times. The order that this happens in is unimportant.