What throttle body fits the ASE H Series billet intake manifold?

The flange is a standardized 90mm Ford-style pattern, so AEB, K-Tuned, Skunk2 and any other throttle body on that bolt pattern will mount directly.

Why are the runners curved?

Straight runners on a front-wheel-drive car, especially with spacers, tend to put the plenum into the underside of the hood unless the engine is leaned over. Curved runners solve hood clearance, make charge piping easier to route, and clear the transmission bracket.

Are the runners polished inside?

No, and that is intentional. The internal finish is rough enough to aid air speed and reduce intake air temperature, but smooth enough not to restrict flow. A hyper-smooth runner increases air friction against the wall surface and raises intake air temps.

Is the manifold welded or bolted together?

Bolted. Sixteen bolts retain the plenum against a wider, thicker gasket surface with the bolt holes brought inboard. Bolting rather than welding means the manifold can be opened and cleaned out if an engine fails and sends debris into it.

How many injectors does it hold?

Eight 14mm injectors in a dual injector configuration. The injection angle is kept close to Honda's original spec to preserve atomization at low air speed, which keeps idle and cruise fuel trims manageable on street driven cars.

What finishes are available?

Silver, Black and Gold, and Black Silver.

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H22 H Series Billet Intake Manifold | ASE

Q: Will this fit an H22 in an Accord or Prelude?

Not without modification. The manifold is designed around H22 VTEC swap installations in Civic and Integra chassis. Accord and Prelude applications require modifying the rear transmission bracket for the manifold to clear.

$1,799.99

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Finish Silver Black & Gold Black Silver

This is the Autosports Engineering Billet Intake Manifold for H Series Engines — a one-piece billet unit developed over roughly three years from the proven ASE DIY manifold kit, with runner geometry validated on a SuperFlow bench before anything was committed to aluminum.

Fitment — read before ordering

Designed around H22 VTEC swap installations in Civic and Integra chassis. Accord and Prelude applications are possible but require modification to the rear transmission bracket — the manifold will not clear without it. If you are running the engine in its original chassis, plan for that work before you order.

Specifications

Billet 6061-T6 aluminum, machined in-house in the USA
8 × 14mm injectors, dual injector configuration
90mm Ford-style throttle body flange — fits AEB, K-Tuned, Skunk2 and other standard 90mm patterns
Big bore fuel rail included
Thermal plenum gaskets
NPT ports for booster and vacuum
Side and center feed options
Sixteen-bolt plenum retention

What the design does differently

Curved runners. Straight runners on a front-wheel-drive car tend to put the plenum into the underside of the hood, particularly with spacers. Curving them solves hood clearance, eases charge piping routing, and clears the transmission bracket.
Round plenum port entry with a long transition. The oval-to-round transition is stretched over a longer distance than the DIY kit, which helps air speed and velocity and keeps the charge off the runner walls — reducing intake air temperature.
Deliberate internal surface finish. Rough enough to aid air speed and hold IAT down, smooth enough not to restrict. Polishing the runners smooth is a common assumption and the wrong answer.
Sixteen bolts and a wider, thicker gasket surface with the bolt holes brought inboard, so bolts backing out between rounds doesn't turn into a boost leak.
Bolted rather than welded. If an engine lets go, the plenum comes off and the manifold can be cleaned out. Welded assemblies trap debris.
Factory-referenced injector angle. Kept close to Honda's original rather than reoriented for machining convenience, preserving atomization at low air speed so idle and cruise fuel trims stay manageable.
Bowed plenum back plate for additional plenum volume.