Reply to "Header Size"

panteradougMember

I have Halls 180's. Bob from Precision Proformance makes them. They use 18" 2-1/2"ID glass packs. The primaries are 2" and they were made for my A3 Motorsport heads.

The mufflers are loud at full throttle. Kinda civilized on the street...sort of.

I am kind of surprized that no one is using step tube design. I know for a fact that they are very effective in the vintage road race cars and all of the front runners are using them.

The front runners are also making 650hp out of a 289. Step tubes under those conditions have to be a considerable difference.

11/27/086:50 AM

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