Reply to "What is the point of 180 headers?"

George PAdmin.

The correct grouping of the exhaust primaries depends upon the firing order of the engine in question. The Cleveland firing order is:

1-3-7-2-6-5-4-8

To evenly space the exhaust pulses in each side of the bundle of snakes, you'll group the primaries so that every other cylinder in the firing order is in the same grouping.

Collector A: 1-7-6-4

Collector B: 3-2-5-8

9/20/081:07 AM

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