VTT Billet High-Flow Oil Cap Vent Adapter - B58TU / S58

Blow-by rises with boost. On a B58TU or S58 making far more than stock power, the factory crankcase ventilation, which was sized for stock output and emissions rules, can't get the pressure out fast enough. That pressure fights ring seal and pushes oil vapor through the engine, which can mean leaks, oil use, smoke and lost power. This billet adapter turns the oil cap position into a high-flow crankcase vent.

What you get

• Billet adapter that gives the crankcase a larger exit at the oil cap.
• Two styles. "S58/B58(TU) stock VC style" is for the factory valve cover. "VTT Billet/Cast VC Style (screw in)" threads into a VTT billet or cast valve cover.
• Built for high-boost engines, where the factory ventilation is past its limit.

Brand: VTT · Part #: VTT-OILCAP-16ORB-ADAPTER

• Ships from the brand or distributor, usually in 3–7 business days.
• Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.