I have a set of 6 new, never installed, 45mm velocity stacks made by RHD Engineering. RHD one-piece trumpets are machined from solid 6061 billet Aluminum.
All trumpets are 38mm tall and are a correct fit for 45mm Weber DCOE, DHLA, IDA and IDF.
Each stack has a rolled lip to minimize turbulence air and ensure maximum air flow potential!
I am asking $150 for the set, which is a good discount from what they cost!
**Stacks are shown as-is and do not include the mounting hardware.
Let me know if you have any questions or check out the RHD website for additional specs:
http://racehead.com.au/products-page/velocity-stacks-and-spacers/42-x-38-trumpet/