Just Bought Header

[jkrolikowski]

I thought I found a good deal on a header, but after ordering it and removing the heat shield I realized that a header might not do much for me since it looks pretty much the same as the exhaust manifold I already have... I have the a4 header - the 4-2-1 design. Furthermore, I just received the header and notice that the o2 sensor hole is located on the front whereas my existing a4 manifold has the sensor located on the underside of the car. So now I'm wondering if I shouldn't bother replacing it and just sell the header I just bought. It's chrome, so it would look good, but I don't see how it could improve performance and I'd have to relocated the o2 sensor.

[steelbluesleepR]

I thought I found a good deal on a header, but after ordering it and removing the heat shield I realized that a header might not do much for me since it looks pretty much the same as the exhaust manifold I already have... I have the a4 header - the 4-2-1 design. Furthermore, I just received the header and notice that the o2 sensor hole is located on the front whereas my existing a4 manifold has the sensor located on the underside of the car. So now I'm wondering if I shouldn't bother replacing it and just sell the header I just bought. It's chrome, so it would look good, but I don't see how it could improve performance and I'd have to relocated the o2 sensor.

it will look better, but if it is an ebay, megan, or DC header it wont really do you any good. the a4 exhaust manifold is the best stock manifold available for the f22ax motor. headers other than the bisimoto header and a few select others have only been proven to get maybe 1-3 more hp than the stock a4 manifold.

[drew12000]

what brand of header did you buy?

[xaaronx]

it didn't have an o2 bung on the downpipe? most have it up top and on the downpipe. you could always have one welded in if you're wanting to keep the header

[jkrolikowski]

what brand of header did you buy?

It's not a brand name. I bought it from TAS online. You can look it up. It's the $99 chrome header.

[jkrolikowski]

it didn't have an o2 bung on the downpipe? most have it up top and on the downpipe. you could always have one welded in if you're wanting to keep the header

No sir. Does not have a hole in the downpipe. So now the question is can I even relocate the o2 sensor from the downpipe on my existing header to the top of this new header?

[Losiracer2]

before you go selling it, make sure your old manifold doesn't have any hairline cracks in it, that happens overtime to a lot of members here. But thats usually on the cast A1 and A6 manifolds, not so much the A4 tubular manifolds. But its good to double check anyways.

[jkrolikowski]

before you go selling it, make sure your old manifold doesn't have any hairline cracks in it, that happens overtime to a lot of members here. But thats usually on the cast A1 and A6 manifolds, not so much the A4 tubular manifolds. But its good to double check anyways.

I'd like to keep it at this point, but would it be alright to relocate the o2 sensor from the downpipe to the top pipe? I'm sure I could splice and extend the wire, but will there be any issues with the location?

[ExplodingCake]

Bad thing is it only reads 1 cylinder.

[jkrolikowski]

Bad thing is it only reads 1 cylinder.

Kudos! Good point. Well... Is that necessarily a bad thing? Will it dampen performance or set off my check engine light?

[deevergote]

It won't change anything negatively.

However, you won't see any considerable gains from that header, you're right.

Really, the only header to make any worthwhile power is the header from Bisimoto... and you're not going to get that for $99.

[ExplodingCake]

Kudos! Good point. Well... Is that necessarily a bad thing? Will it dampen performance or set off my check engine light?

If your car is fine , no CEL will be lit. But if that certain cylinder is pooping , well you know the drill.