STEED SPEED | Cat C15 Single Turbo Manifold (With PRYO and DRIVE PRESSURE Bungs)

STEED SPEED CNC Billet Steel Exhaust Manifold for CAT 3406 / C15 – Dual EGT & Drive Pressure Ports

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

The Steed Speed billet exhaust manifold is a CNC-machined, one-piece manifold built for CAT 3406 and C15 owners who are done dealing with cracked manifold sections, blown gaskets, leaks, and constant retorquing.

This version comes pre-drilled and equipped with dual bungs for EGT/pyrometer and exhaust drive pressure, making it easy to monitor two of the most important parameters when tuning or diagnosing a performance CAT setup. No drilling or welding your new manifold—your EGT probe and drive pressure setup have dedicated ports ready to go.

The one-piece billet design eliminates the common failure points found in traditional multi-piece manifolds. No slip joints to leak, no sections to shift, and significantly less movement through repeated heat cycles.

Beyond durability, the Steed Speed design is built for better exhaust flow and turbocharger performance. The improved manifold design can help reduce EGT and exhaust drive pressure while improving turbo response, boost, and overall efficiency.

Whether you're building a hard-working C15 or a high-horsepower CAT, this is a manifold you can install and stop worrying about.

And it's backed by a lifetime warranty.

Key Features

• CNC-machined billet steel construction
• One-piece manifold design
• Pre-drilled dual sensor bungs
• Dedicated ports for pyrometer/EGT and exhaust drive pressure
• No need to drill or weld the manifold for EGT/drive pressure monitoring
• Eliminates common multi-piece manifold leak points
• Improved exhaust flow
• Helps reduce EGT under load
• Helps reduce exhaust drive pressure
• Improved turbo spool and response
• Supports higher-performance turbocharger setups
• Easier on manifold studs and gaskets
• Designed for long service life
• 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

Caterpillar 146-9445

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