I've posted on here (and on Facebook) before about my experiences with refurbing NLA SPI Inlet Manifolds and I decided to put together a guide as I've had a fair number of questions about it all. I'm sure its not definitive and I'm sure there are other ways, I'm not claiming to be an expert, just a guy who wanted his inlet manifold to be better :)
Thought I'd share, hope it helps some folks.
Updated 5th Nov 19 - Made a few revisions/tweaks, v2.1.
Updated 24th Oct 20 - Made a few more revisions, v2.2
Edited by Pops_Guild, 24 October 2020 - 02:49 PM.