The catch was acid.

Catch Can was EXCEED – to protect the engine. Protect your engine from oil and deposits buildup with EXCEED Catch Can made with high quality. • Reduces oil and throttle entry into the intercooler • Improves engine performance and extends its lifespan • Comes with all accessories including hoses and brackets • Lightweight and durable aluminum design • Contains essential parts for installation Ideal for modification enthusiasts and those interested in maintaining engine cleanliness