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Hey MSO, When I rebuilt my engine, I bought BC0400S valve spring/retainers for a 2.3l mzr. When I gave it to the machine shop to install while they're cutting my valve seats, hot tank, etc, they gave it back saying that it wouldn't work and it was wrong. I have a few pics for you all to see...

Anybody running the stage 2 Kelford camshafts ? Part # 247-B. I bought it used with around 5k miles of usage. I'm curious if it can be ran with a stock bottom end as far as the piston to valve clearance due to the increased lift and duration. I tried to search around but no info on these cams in...

I'm tryna get another motor on the side to build so I can throw it into my '13 MS3. It's my daily driver but I wanna be in the 400-450whp area. I was planning to go with H-Beam Rods, aftermarket pistons, bearings, etc on the bottom end, but are sleeves necessary ? I see a lot of ZZB stories...