STEED SPEED | Cat C15 Single Turbo Manifold

STEED SPEED CNC Billet Steel Exhaust Manifold for CAT 3406 / C15

This isn’t your typical cast manifold—and it’s definitely not your granddad’s CAT setup.

The Steed Speed billet manifold is a CNC-machined, one-piece unit built for guys who are done dealing with cracked sections, blown gaskets, and constant retorquing. This is the new school—stronger, tighter, and built to actually perform.

You’ve heard the name. There’s a reason it keeps coming up.

The one-piece billet design eliminates the common failure points found in multi-piece manifolds. No joints to leak, no sections to shift, no nonsense. It’s easier on studs, easier on gaskets, and under normal conditions, you’re not going back in to retorque it every few heat cycles.

Real-world results? Lower EGTs, faster turbo response, higher peak boost, and reduced drive pressure. Translation: your turbo works better, your engine runs cleaner, and you stop fighting your setup.

If you want something you install once and stop thinking about—with a lifetime warranty backing it—this is it.

Key Features

• CNC-machined billet steel construction
• One-piece design eliminates common leak points
• Proven lower EGTs under load
• Faster turbo spool and improved response
• Higher peak boost capability
• Reduced drive pressure
• Easier on studs and gaskets
• Includes M10 x 1.5 studs and bolts
• Built for long service life and efficiency
• Backed by a lifetime warranty

Fitment

• Fits round-port Caterpillar 3406 and C15 engines
• Designed to clear under Peterbilt and Kenworth hoods
• Compatible with C15 ACERT single turbo conversions

Replaces

• Direct replacement for 146-9445

Always confirm your casting number before ordering if you have any concerns about fitment.