Exhaust Manifolds

The exhaust manifold is one of the most hardworking components in your vehicle, enduring extreme heat cycles and high pressures. At Exhaust Shop Australia, we provide a range of high-quality replacement manifolds designed to eliminate common issues like cracking, warping, and leaking. Whether you need a rugged cast iron log-style manifold for a reliable daily driver or a tubular manifold for improved flow on a performance build, our collection ensures a precise fit and optimal thermal management. Replace your compromised manifold today to restore engine power, reduce noise, and improve overall fuel economy.

1. What are the signs of a cracked exhaust manifold?

The most common symptoms include a loud "ticking" or "clapping" noise that is most noticeable when the engine is cold, visible soot buildup around the manifold area, and a distinct smell of exhaust fumes inside the cabin. A cracked manifold can also lead to a loss of power and poor fuel economy.

2. Is it better to choose cast iron or tubular manifolds?

Cast iron manifolds are the gold standard for longevity and heat soaking; they are quieter and less likely to leak over hundreds of thousands of kilometers. Tubular manifolds (often called headers) are better for performance, as they allow exhaust gases to escape more freely, which can increase horsepower.

3. Do new manifolds come with gaskets and bolts?

While some manifolds are sold as a kit, many are sold as the cast unit only. We strongly recommend purchasing new Exhaust Manifold Gaskets and high-tensile studs/bolts to ensure a proper seal, as old hardware is often brittle from heat.

4. Why do exhaust manifolds warp?

Manifolds warp due to extreme temperature fluctuations. In Australia’s hot climate, or during heavy towing, the metal expands significantly. If the manifold doesn't have room to move or if the bolts are unevenly torqued, the flange can warp, leading to persistent leaks.