[Jay S]

I’ve collapsed quite a few Wix filters even with a factory bypass on different platforms. Cold weather really tests them. We use Wix a lot, but these days there are often better made filters, they seem like they are cheaper made all the time.

My preference is to pick a filter that has a higher built in bypass pressure with the external GM bypass blocked. The original external bypass pressure on a lot of GM stuff was in my opinion to low. The low bypasss was ok for flat tappets, but causes a more issues with roller cams. I have mine blocked with roller cams, unblocked with flat tappets. I see a lot more bearing scars when running a stock external 3 to 5 low pressure bypass. The internal filter bypasses generally have higher differential pressures for better filtration.