Acura 91-05 NSX Exhaust Manifold Gasket 18115-PR7-A02

Acura NSX Exhaust Manifold Gasket - 18115-PR7-A02

Got an exhaust leak from your manifold on your NSX? Your exhaust manifold gaskets are done. The Acura NSX exhaust manifold gasket (part number 18115-PR7-A02) seals your exhaust manifold to your cylinder head. When the gasket gets old from constant heat cycles, the metal layers compress and the gasket stops sealing properly. Once it's not sealing right, exhaust gases leak past the gasket at the manifold flange. You'll hear a ticking sound at idle that gets louder when you rev the engine, or you'll smell exhaust fumes from the engine bay. Replace your exhaust manifold gaskets if they're leaking or if you're doing exhaust manifold work.

Here's Why Exhaust Manifold Gaskets Fail

Your exhaust manifold gaskets sit between your exhaust manifolds and your cylinder heads where they're getting blasted with 1200+ degree exhaust gases every time you're driving. The gaskets are made from multi-layer steel so they can handle the heat, but after 10-20 years of heat cycles, the metal layers compress and they lose tension. Once they've compressed too much, they don't seal the manifold to the head anymore. Exhaust gases leak out at the flange. You'll hear a distinct ticking or tapping sound from the engine that speeds up with RPM. That's exhaust escaping past the gasket. If the leak's bad enough, you'll smell exhaust in the cabin or you'll see black soot around the manifold flange.

Multi-Layer Steel Construction

This gasket's made from multi-layer steel (MLS). It's not a paper gasket or a composite gasket. The multi-layer steel design handles the extreme heat from your exhaust better than other gasket materials. The layers compress when you torque the manifold bolts down and they create a gas-tight seal. MLS gaskets hold up way better than paper or composite gaskets in high-heat applications like exhaust manifolds.

Sold Individually - You Need Two

These gaskets are sold individually. Your NSX has two exhaust manifolds (one per cylinder bank on the V6), so you need two gaskets for a complete job. Order two gaskets if you're replacing both sides. If you're just replacing one side because that's where the leak is, order one gasket. But honestly, if one side's leaking, the other side's probably not far behind. Do both while you're in there.

What You Get

• Acura NSX exhaust manifold gasket (sold individually)
• Part number: 18115-PR7-A02
• Genuine Acura OEM replacement
• Multi-layer steel (MLS) construction
• Seals exhaust manifold to cylinder head
• You need 2 gaskets total (one per cylinder bank)

Fits Your Car

• 1991-2005 Acura NSX

Compatible Engines

• C30A (1991-1996 NSX)
• C32B (1997-2005 NSX)

Note: These gaskets are sold individually. You need two gaskets total (one per cylinder bank). Order two if you're doing both sides. When you're installing new gaskets, clean all the old gasket material off your cylinder heads and exhaust manifolds with a scraper and some brake cleaner. If there's crud stuck to the mating surfaces, your new gaskets won't seal properly. Don't reuse exhaust manifold bolts if they're stretched or corroded. Torque the manifold bolts to spec in the correct sequence from the center out. If you don't torque them right, the gaskets won't seal and you'll still have a leak. Let the engine cool down completely before you start working on it. Exhaust manifolds stay hot for a long time after you shut the engine off.