Cometic MLS Exhaust Manifold Gasket – Nissan KA24DE | 1991-1998 | .030" Thickness | 1.575" Square Port

Seal your KA24DE’s exhaust manifold with confidence using the Cometic MLS Exhaust Manifold Gasket — a multi-layer steel (MLS) exhaust manifold gasket engineered for the Nissan KA24DE engine as used in the 1991–1998 Nissan 240SX (S13/S14) and other KA24DE applications. At .030" thickness with a 1.575" square port opening, this gasket is designed for extreme exhaust temperatures and pressures, resists corrosion and burn-through, and requires no sealants for installation. A critical sealing component for any KA24DE engine build, manifold replacement, or exhaust system upgrade.

Key Features:

• Multi-Layer Steel (MLS) construction — multiple layers of precision-stamped steel for superior sealing under extreme exhaust temperatures and pressures
• .030" thickness — standard thickness for direct OEM-replacement and performance exhaust manifold applications
• 1.575" square port — square port opening matched to the KA24DE exhaust manifold port dimensions
• Maintains torque set — MLS construction retains clamping load over time, preventing gasket relaxation and exhaust leaks
• Corrosion resistant — steel construction resists the corrosion and oxidation that degrades conventional composite exhaust gaskets
• Burn-through resistant — will not burn through or push out under extreme exhaust temperatures and pressures
• No sealants required — MLS design seals without exhaust sealant or RTV for a clean, professional installation
• Compatible with mixed materials — withstands different combinations of cylinder head and exhaust manifold materials

Performance Benefits:

• Extreme Temperature and Pressure Resistance: MLS construction is designed for the extreme exhaust temperatures and pressures of performance and forced induction applications — where conventional composite gaskets can burn through or push out
• Long-Term Sealing Reliability: MLS gaskets maintain their torque set over time, resisting the gasket relaxation that causes exhaust leaks on conventional gaskets after repeated heat cycling
• No Sealant Required: Clean, sealant-free installation eliminates the risk of sealant contamination in the exhaust stream and simplifies future disassembly
• Corrosion Resistance: Steel construction resists the rust and oxidation that causes composite exhaust gaskets to deteriorate and leak — particularly important in Canadian and northern climates with road salt exposure
• Mixed Material Compatibility: Seals reliably between different combinations of cast iron and aluminum exhaust manifold and cylinder head materials without compatibility concerns

Specifications:

• Brand: Cometic Gasket
• Part Number: C4201-030
• Gasket Type: MLS (Multi-Layer Steel) exhaust manifold gasket
• Thickness: .030 inches
• Port Style: Square
• Port Size: 1.575 inches
• Sealant Required: No
• Application: Nissan KA24DE — 1991–1998

Fitment Information:

• Nissan KA24DE engine — 1991–1998 applications
• Common KA24DE applications include: 1991–1994 Nissan 240SX (S13), 1995–1998 Nissan 240SX (S14), and other KA24DE-equipped Nissan vehicles
• Note: Verify your specific year and engine variant before ordering. Confirm port dimensions match your exhaust manifold before installation.
• Installation: Professional installation recommended for exhaust manifold gasket work

What’s Included:

• Cometic MLS exhaust manifold gasket (C4201-030)

Installation Notes:

• Clean all mating surfaces thoroughly before installation — remove all traces of old gasket material and corrosion
• Inspect exhaust manifold and cylinder head mating surfaces for warping or damage before installation
• No sealant required — install dry for best results
• Torque exhaust manifold fasteners to the manufacturer’s specification in the correct sequence
• Re-torque fasteners after the first heat cycle to account for initial seating
• Inspect for exhaust leaks after the first heat cycle

Why MLS Exhaust Gaskets?

Traditional composite exhaust manifold gaskets use layers of compressed fibre, graphite, or similar materials that can burn through, push out, or deteriorate under the extreme temperatures and pressures of performance exhaust applications. Multi-Layer Steel (MLS) gaskets replace these materials with precision-stamped layers of spring steel that seal through elastic deformation — conforming to minor surface irregularities while maintaining consistent clamping load through heat cycles. MLS gaskets do not burn through, do not push out, and maintain their sealing integrity far longer than composite alternatives — making them the preferred choice for performance builds, forced induction applications, and any engine where long-term exhaust sealing reliability is critical.

Why Cometic?

Cometic Gasket has been manufacturing precision engine gaskets for motorsport and performance applications since 1989. Their MLS gasket lineup covers hundreds of engine applications with application-specific port dimensions, thickness options, and material specifications. Cometic’s gaskets are trusted by professional racing teams and performance engine builders worldwide — a benchmark for quality and reliability in the engine gasket market.

Perfect For:

• 1991–1998 Nissan 240SX (S13/S14) KA24DE exhaust manifold replacement or upgrade
• KA24DE engine rebuilds requiring a reliable, long-term exhaust manifold sealing solution
• Performance KA24DE builds running aftermarket exhaust manifolds where MLS sealing is preferred
• Forced induction KA24DE builds where exhaust temperatures and pressures exceed the capability of composite gaskets
• Anyone replacing a leaking or failed factory exhaust manifold gasket with a premium MLS upgrade

Pro Tip: Inspect your exhaust manifold for warping before installation — a warped manifold will prevent even the best gasket from sealing correctly. A straight edge and feeler gauge can identify warping; a machine shop can resurface a warped manifold for a fraction of the cost of a replacement.

Note: No sealant required — install dry. Re-torque fasteners after the first heat cycle. Verify port dimensions match your exhaust manifold before ordering.