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4-1 vs 4-2-1 exhaust downpipes.

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LuckyDip23
Scooby Slapper



Joined: 26 Feb 2008
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PostPosted: 16:22 - 14 Apr 2008    Post subject: 4-1 vs 4-2-1 exhaust downpipes. Reply with quote
Hi All

i need to buy new downpipes this week cos mine are finally fooked and was wondering if theres any differences (in terms of power, acceleration etc) between a "4 into 1" system or "4 into 2 into 1" and is one preferrable to the other.

Ta Gaz.
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Mudskipper
World Chat Champion



Joined: 22 Aug 2006
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PostPosted: 17:02 - 14 Apr 2008    Post subject: Re: 4-1 vs 4-2-1 exhaust downpipes. Reply with quote
404_NotFound wrote:
Hi All

i need to buy new downpipes this week cos mine are finally fooked and was wondering if theres any differences (in terms of power, acceleration etc) between a "4 into 1" system or "4 into 2 into 1" and is one preferrable to the other.

Ta Gaz.


What bike?

I know that fitting the 4-1 instead of standard 4-2-1 on the CBR400 causes a massive flat spot.
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SoND
World Chat Champion



Joined: 10 Jul 2005
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PostPosted: 17:17 - 14 Apr 2008    Post subject: Reply with quote
4-1 will provide more top end power at the expense of midrange

4-2-1 will give you more midrange at the expense of top end.
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LuckyDip23
Scooby Slapper



Joined: 26 Feb 2008
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PostPosted: 16:24 - 15 Apr 2008    Post subject: Reply with quote
its on a 2000 yamaha thundercat.
has anyone else out there bought aftermarket headers and have any experince of different setups or brands?

Thanks again

Gaz.
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Reevo8
World Chat Champion



Joined: 30 Jun 2004
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PostPosted: 18:38 - 15 Apr 2008    Post subject: Reply with quote
I would reckon that the bike would need setting up after changing the headers! Hense causing a flat spot for mudskipper.
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