But for the price why not just use the URO one and use the OEM plastic relief?Just wanted to say that in the last few months I have been heavily interested in these aluminium oil filter caps and have been studying the oil flow through these caps and the bypass function. That being said I have also been in contact with Malo industries and helped them develop an aluminum cap that properly supports the oil filter bypass plate so there will be no chance of failure, and I will be reviewing that product in the spring during my oil change. But I will also do an early review with images and technical info about the oil flow.
Also I wanted to say in regards to why @matreyia had increased metal shavings with the cts cap, the reason is apparent in the video he posted where it was clear that the oil filter bypass plate was damaged, hence why he had to hold the base plate down to prevent it from popping off. When this happens with a cap that does not have a supported bypass base plate the bypass spring will push up the base plate allowing oil to flow over the oil filter and down past the gap of the base plate and into the return side of the oil filter housing. This essentially bypasses the oil filter allowing dirty oil and contaminants to go back to the engine hence increasing wear and increasing metal particulates.
This would not happen with an aluminium oil filter housing cap with proper bypass base plate supports even with a broken bypass plate, because the support tabs holds the baseplate down despite the base plate tabs being broken creating a seal as was intended. This essentially allows for proper oil flow through the filter and thus proper filtration.