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Apr 22, 2006 | 01:43 AM

elmstreet

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Joined: 03-07-06

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From: Arlington, Texas

noob header question

can someone please explain the difference between 4-1 and a 4-2-1 header? what means what

Apr 22, 2006 | 04:46 AM

InfinityzeN

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Joined: 04-02-06

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From: Harker Heights, TX

Four pipes from the engine merging into one at the same point compared to four pipes from the engine merging to two pipes merging to one pipe.

Apr 22, 2006 | 07:51 AM

AnEmIc

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Joined: 10-07-05

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From: Jax

Quote:

Originally Posted by elmstreet

can someone please explain the difference between 4-1 and a 4-2-1 header? what means what

Quote:

Originally Posted by InfinityzeN

Four pipes from the engine merging into one at the same point compared to four pipes from the engine merging to two pipes merging to one pipe.

The 4-1 has a better top end, but looses a bit off the bottom end.
The 4-2-1 doesnt have quite the HP top end but holds a better mid range power.

but the only header out is pacesetter 4-1

Apr 22, 2006 | 09:45 AM

mugencivicsi

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Joined: 05-23-05

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From: Ajax, Ontario

header

TIPICAL 4-1 HEADER

YOU CAN SEE THAT EACH TUBE FROM EACH CYLANDER MERGE DOWN AT THE COLLECTOR WHICH ATTACHS TO THE REST OF THE EXHAUST SYSTEM

TIPICAL 4-2-1 HEADER

YOU CAN SEE THAT EACH CYLANDER TUBE MERGES WITH ONE OTHER MAKING IT A DUAL TUBE SYSTEM, THEN THE 2 TUBES THEN MERGE INTO ONE JUST BEFORE THE COLLECTOR