Hi everyone,

I’ve been doing a bit of reading about different intake performance and have decided to modify my B intake to a dual plane.

My questions are-

1- should I open up the 4 holes radius larger to suit the spacer I have? (See below photo with marker)

2- should I machine the top surface flat or leave the factory depression?








Thanks, Dennis.

56 F100 - 272 Y Block
NSW, Australia.