Which air gap manifold?

Thanks guys, looks like it'll be worth the change.
Other rebuilds this year include putting a Suregrip in the rear and using MT Darg Radials at the strip.
Current et is14.2 (98mph)due to the wheels spinning so much off the line. Hoping to bust into the 13s (mid 13s?) next year once all the above changes are in place.:thumbrig: