Dorman 674-578 Exhaust Manifold - Rear

Dorman 674-578 Exhaust Manifold for Rear Bank Repair

Dorman 674-578 is a cast iron exhaust manifold engineered to match the fit and function of the original part on specified vehicles. It is built for rear-bank service and includes the gaskets, flange, heat shield, and downpipe hardware needed for a complete exhaust manifold repair.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with oval port shape
• Includes gasket or seal and heat shield
• Mounting hardware included for installation
• Package contents support a complete manifold replacement
• Fits 1995-2001 Nissan Maxima, rear
• Fits 1996-1998 INFINITI I30, rear
• Fits 1999 INFINITI I30, rear, wo/California Emissions
• Fits 2000-2001 INFINITI I30, rear

Detailed Description

This Dorman exhaust manifold is a direct-fit replacement for rear-bank applications on the Nissan Maxima and INFINITI I30. It is precision-engineered to align with the original manifold’s fit and function, helping restore proper exhaust routing on 1995-2001 Nissan Maxima rear applications and 1996-2001 INFINITI I30 rear applications, including the 1999 INFINITI I30 rear without California emissions. Part number 674-578 is built from cast iron for strength and thermal durability in demanding exhaust conditions.

This part cross-references 101297 and 1400431U00 for the same application.

What It Helps Repair

• Exhaust leaks at the manifold
• Cracked or warped original manifold housings
• Failed manifold gasket sealing surfaces
• Broken or corroded downpipe connection hardware
• Heat-related exhaust noise from the rear bank

Installation Notes and Tips

Verify rear-bank fitment by year, model, and emissions configuration before installation. Inspect the cylinder head sealing surface, flange alignment, and fastener condition during repair. Replace damaged studs or nuts as needed and follow the vehicle service procedure for torque sequence and exhaust sealing.

Quality Assurance

Dorman manufactures this exhaust manifold to match original fit and function on the listed vehicles. The included gasket, flange, studs, nuts, and heat shield support a complete repair using the correct OE-style configuration.