 X-pipe or Cross-over Exhaust, Which one? |
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| SteveNMaine |
 May 16 2025, 04:57 AM
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#1
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Newbie  Group: Members Posts: 43 Joined: 12-August 24 From: Maine Member No.: 28,288 Region Association: None  |
I am looking at the Bursch exhaust for my 2056 and need some guidance.
The Bursch BX.1404.SS combines cyls 2&4 and 1&3 crossing over from one side of the engine to the other. The Bursch BX.1402.SS combines cyls 1&2 and 3&4 crossing over the pipes on just the same side. What is the difference in performance? |
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| mate914 |
May 16 2025, 09:23 AM
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#2
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Matt Group: Members Posts: 859 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States 
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QUOTE(SteveNMaine @ May 16 2025, 06:57 AM)  I am looking at the Bursch exhaust for my 2056 and need some guidance. The Bursch BX.1404.SS combines cyls 2&4 and 1&3 crossing over from one side of the engine to the other. The Bursch BX.1402.SS combines cyls 1&2 and 3&4 crossing over the pipes on just the same side. What is the difference in performance? I don't think you will feel a difference. Free flow in better. Matt |
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| SirAndy |
May 16 2025, 10:02 AM
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#3
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Resident German Group: Admin Posts: 42,227 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
The firing order is 1-4-3-2 so both of those exhausts should work about the same.
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| Root_Werks |
May 16 2025, 11:17 AM
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#4
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Village Idiot Group: Members Posts: 8,692 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
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Decent explanation of headers:
https://www.youtube.com/watch?v=puAACxYP_dw Believe the T1 shares the same firing order as a T4. |
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| Nogoodwithusernames |
May 16 2025, 02:31 PM
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#5
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Member Group: Members Posts: 289 Joined: 31-May 16 From: Sutter, CA Member No.: 20,051 Region Association: None |
The part numbers posted look to me like two parts in the same system and both are needed unless you're using your existing heat exchangers.
https://lnengineering.com/bursch-bx-1404-ss...ust-system.html https://lnengineering.com/bursch-bx-1402-ss...eel-header.html As far as which cylinders to merge you want 1-3 and 2-4 grouped so that pulses are 180° out from each other. Doesn't matter in a 4:1 system but in a 4:2:1 or 4:2 it will. |
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