Toyota 1HZ Exhaust Manifold – SiMo Ductile Cast Iron
Engineered with a split pulse design, keeping exhaust pulses from each cylinder separated all the way to the turbine housing. Compared to a merge or log-type manifold, this improves cylinder scavenging, increases torque and power across the rev range, and sharpens turbo response.
Square port design, matched to the factory 1HD-FT and 1HD-FTE port shape. Also bolts straight on to the 1HZ and 1HD-T with no modification required. Ideal for pairing with a CT26-based turbo when turbocharging a naturally aspirated 1HZ. Running a T3 flange turbo instead? Check out our 1HZ Exhaust Manifold, T3 Flange version.
Finish options
Choose your finish at checkout: raw cast finish, or HPC coated in extreme-temp black.
What's included
- Pressed stainless turbine-to-manifold gasket x1
- High tensile steel manifold studs x4 (or upgrade to Inconel, see below)
- Stainless steel washers x4
- Wurth copper-coated lock nuts x4
Optional Inconel 625 studs
For extreme-heat applications or high-boost builds, upgrade to Inconel 625 studs for maximum resistance to thermal fatigue and seizing, available as an add-on
