Bourne HPP Intake & Exhaust Stud Kit for Honda K Series

Bourne HPP K-Series Intake & Exhaust Manifold Stud Kit - K20/K24

The studs that hold your intake and exhaust manifolds to the cylinder head are doing a quietly critical job: they clamp each manifold against its gasket and keep that seal tight through every heat cycle and every vibration the engine throws at them. On a stock car with soft factory mounts, the OEM hardware handles that fine. But the moment you stiffen your engine mounts for a build, the game changes, and that's exactly the problem this Bourne HPP kit solves. It's a complete set of motorsport-grade studs, six for the intake and five for the exhaust, built to stay put where factory hardware won't.

Why Factory Hardware Works Loose

Here's what actually happens. Solid aluminum or urethane engine mounts are great for a build because they stop the engine from moving around, which sharpens response and keeps everything planted. The trade-off is that they transmit far more of the engine's vibration and high-RPM harmonics straight into the chassis and into the engine's own fasteners. That constant buzz is the enemy of a threaded fastener, and over time it works factory manifold nuts and studs loose. When an exhaust stud backs off, you get a header or manifold leak, a ticking exhaust, lost power, and heat where it shouldn't be. When an intake stud loosens, you get a vacuum or boost leak that leans the engine out and makes it run rough. On a race car, either one can end your day.

Why Studs, and Why Better Steel

Studs are simply the right way to mount a manifold under these conditions. Because the stud stays fixed in the head and you torque a nut onto it, you get more consistent, even clamping than a bolt that twists as it tightens, and the manifold slides cleanly onto the studs for an easier install. Bourne makes these from motorsport-grade steel engineered to hold their torque under the harmonics that shake factory hardware loose. On the exhaust side that material choice matters twice over, because exhaust studs live in brutal heat and are notorious for corroding and seizing on high-mileage Hondas, and better steel stands up to that far longer.

When You Actually Need These

Be straight with yourself about your setup. If your K-series is sitting on stock rubber mounts and driven on the street, the factory manifold hardware is usually fine and you don't need to touch it. These earn their keep on any build running solid or polyurethane engine mounts, on K-swaps, and on high-RPM track and race cars, where the extra vibration is exactly what loosens stock fasteners. If that's your car, this kit is cheap insurance against a leak that's a pain to chase down later.

What's Included

• 6 intake manifold studs
• 5 exhaust manifold studs

Enough to do both manifolds on your K-series in one kit.

Install Note

Thread the studs into a clean cylinder head, then torque the nuts to spec in the proper sequence against fresh manifold gaskets. Clean threads and correct torque are what let these do their job, so it's worth doing right the first time.

Fitment

Fits the K20 and K24 engines, including the K20A, K20A2, K20A3, K20Z1, K20Z3, K24A1, K24A2, K24A4, and K24A8, found in:

• 2002-2006 Acura RSX (Base and Type S)
• 2004-2008 Acura TSX
• 2003-2007 Honda Accord
• 2002-2011 Honda Civic Si
• 2002-2006 Honda CR-V
• 2003-2011 Honda Element