The engine is a 1776 with an Engle 110 cam, dual Weber 40's, and a 042 head - 40 x 35.5.
What header diameter is recommended for this engine?
I'm considering the "Streetsport", by BAS.
"Streetsport" - www.ahnendorp.com/beetle1.html
Tube inside diam. 35-41mm slips over the original
heaterboxes - up to 140HP
Steel tubes and aluminum coated silencers 21134 342,30
Stainless tubes and stainless silencers 21137 607,95
Thanks for your help.