What is the capacity of the Outlaw catch can?

5 quarts. The large volume is intentional — it gives crankcase pressure somewhere to go, which helps the rings seal on an engine built with larger ring gaps.

How many baffle stages does the Outlaw catch can use?

Four. A fully perforated entry plate under the cap, an angled drain ramp feeding slotted holes into the collection volume, a stainless wool coalescing section at the highest point in the can, and a dual-stage perforated plate with smaller holes before the outlet.

What stops vapor from going straight out the outlet?

The exit is chambered in its own section and the top of the perforated exit tube is solid. Once assembled there is no path from the inlet side directly to the outlet, so everything is forced through all four stages.

Why is the stainless wool at the top of the can?

Because all liquid has already settled below that point, the wool only ever sees vapor. That keeps it from loading up with oil and clogging.

What port sizes are available?

Inlet and outlet can be configured as -16 AN, -20 AN, or 1.5 inch hose. Most builds use the 1.5 inch hose connection because standard tube and hose is far cheaper to plumb than large AN at these diameters.

Where does this catch can mount?

In the rear of the car or in the passenger compartment. The can is too large for typical engine bay mounting and is designed to be atmospherically vented toward the rear of the car.

A standard ball valve at the base. Most racers put a single grommeted hole in the floor pan, run a hose through it, and drain into a pan under the car while it is on jacks in the pits.

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Autosports engineering

Outlaw Catch Can - In Car | ASE

$449.99 USD

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Catch Can Kit Can Only Can & Firewall Plate Can Firewall Plate & Hose Kit

Autosports Engineering Outlaw Catch Can — In Car

A 5-quart, four-stage baffled catch can built for drag racing. Sized to mount in the rear of the car or the passenger compartment and vent atmospherically toward the rear.

Why capacity matters

A catch can's job isn't only collecting oil — it's keeping crankcase pressure down. Race engines run larger ring gaps, which means more blowby and rising crankcase pressure. That pressure works against the rings sealing, and rings that don't seal push more oil past them and more smoke out the exhaust. Greater can volume gives that pressure somewhere to go.

Four separation stages

Stage 1 — Perforated entry plate. Vapor enters the inlet and immediately meets a fully perforated plate beneath the cap, breaking up the incoming charge before it reaches the body.
Stage 2 — Drain ramp. Oil and residue land on an angled ramp and run down through slotted holes into the collection volume, so caught mist becomes liquid in the bottom of the can instead of re-entering the airflow.
Stage 3 — Stainless wool coalescing section. Positioned at the highest point in the can, so all liquid has already settled below it and the wool only ever sees vapor. Fine mist coalesces into droplets heavy enough to fall back.
Stage 4 — Dual-stage perforation. A second slotted plate with smaller holes forms the final stage before the outlet.

The exit is chambered separately and the top of the perforated exit tube is solid, so there is no path from inlet to outlet that bypasses the sequence. Only hot vapor leaves the can.