Stop babysitting a leaking sandwich plate. Most aftermarket oil cooler kits for the ND Miata have you plumb the cooler in with a sandwich plate wedged between your filter and block — a common leak point once you're actually driving the car hard. The SPD housing skips the sandwich plate entirely. It mounts directly to the block in place of your stock filter housing, so there's nothing sandwiched, nothing to weep oil under load.
Why drivers upgrade to this housing
No sandwich plate, no leak point. Direct block-mount design skips the failure-prone gasket stack that sandwich-plate kits rely on.
Monitor before and after the cooler. Dedicated 1/8" NPT ports on both the feed and return side let you run pressure and temp sensors on each side of your cooler — not just guess.
-10 ORB fittings included. Ready to plumb straight to your cooler — no separate fitting order, no guessing on thread size.
Direct fit for 2016–2023 ND Miata. No modification, no fabrication.
Port configuration
4 x 1/8" NPT — pressure/temp monitoring, 2 on feed side, 2 on return side
2 x -10 ORB (5/8") — external oil cooler feed and return
What's in the box
1 x SPD Oil Filter Housing
1 x OEM oil filter
1 x OEM filter housing gasket
1 x OEM drain plug crush washer
2 x 90° -10 ORB to -10 AN fittings
4 x stainless steel 1/8" NPT plugs
1 x mount bolt
1 x preinstalled -4 ORB plug
Everything you need to run an external cooler is in the kit — no separate parts order required.
Returns
In-stock items are subject to a flat 15% restocking fee if an order is canceled or returned.
