LN Engineering's exclusive full-flow spin-on oil filter adapter allows for use of a conventional spin-on oil filter, rather than expensive and messy cartridge-style filters, and improves oil filtration by eliminating the problematic factory filter bypass that can allow contaminants back into your engine.

https://lnengineering.com/spin-on-oil-filter-adapter-for-my97-08-boxster-cayman-911.html

The LN Engineering Spin On Oil Filter Adapter is a must on all engines, especially those not yet retrofitted with an IMS Retrofit or IMS Solution, as foreign object debris from IMS bearing wear or failure can cause collateral damage in the engine as the factory filter cartridge bypass gets weak over time and allows the stock filter to run in bypass. This allows debris to exit the filter and contaminate the engine.

The spin-on oil filter adapter utilizes a Napa Gold 1042 / Wix 51042 oil filter, originally specified for 97-04 Chevrolet Corvette, rated for 9-11 GPM with 21 micron rating (versus 28 micron rating specified by Napa/Wix for their replacement for the factory oil filter insert) and full-flow filtration (no bypass valve).

New from LN Engineering is $159 

https://lnengineering.com/spin-on-oil-filter-adapter-for-my97-08-boxster-cayman-911.html