DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;) It will also allow you to view images in threads.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
This is what I mean by a mild port and polish (my cylinder head). Gasket matching the head won't do any good if your intake manifold isn't also gasket matched. If you're gasket matching both, then more power to you :hellyeah:I'm also curious...
There's this one.
https://www.ksrperformance.com/product-page/ksr-420a-intake-manifoldYou can make your own since the 420a mani is a two piece, like this...
As far as I know, your two options are: 1) fabricate one from scratch, 2) port and polish a stock manifold. There used to be some Chinese-made sheet metal manifolds available. The quality was dubious, and I'm not sure they're still in production.
I agree that threads will strip before the torque affects the bearing. I actually can't find an exact value in the 420A overhaul manual, but the Neon FSM says the bolt should be torqued to 61 N-m (45 ft-lbs).