Thread: Are guys still blocking off the bypass oil filter housing like H-O used to say to do
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Old 02-16-2026, 11:00 AM
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Jay S Jay S is offline
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Join Date: May 2018
Location: Nebraska City, Nebraska
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Quote:
Originally Posted by HWYSTR455 View Post
Which Fleetguard part number do you run? I know other non-Pontiac racer-people that run those.


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LF767 for a Pontiac with the OEM filter housing with tight clearance headers.

LF581 when there is more room.

LF3538 when there is lots of room.

The aftermarket filters housing that use the in filter bypass all take a different thread, 3/4” instead of 13/16”. These are common OEM Fleetguard numbers for older GM’s.

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