Best Exhaust Manifold For 6 7 Cummins: Compare Eight Options

#1 · Best Overall

1. BD Diesel RAM Manifold

Best for: Thermal-stress-conscious RAM upgrade.

Why it ranks #1: Specified for 6.7L RAM 2500/3500 pickups, it pairs thick-wall construction and a thermal-expansion slip joint with EGT access and supplied turbo and EGR studs.

A two-piece slip-joint center section lets this BD Diesel manifold accommodate natural thermal expansion, addressing stress associated with long, one-piece cast-iron manifolds. For 2019-2024 RAM 2500/3500 pickups, it pairs that construction with split-pulse architecture and a factory-installed EGT sensor port.

Thick-wall casting supports durability in high-heat service, while the slip joint permits expansion that the supplied description says can help avoid breakage. Split-pulse architecture is intended to enhance exhaust flow and turbo response, making it relevant to buyers seeking a performance-oriented replacement. The OEM-style direct-swap format supports installation with the complete EGR system, and included turbo and EGR studs provide mounting hardware. A factory-installed EGT port also simplifies aftermarket gauge setup.

Skip it if you have a 2007-2018 RAM 6.7L and want a gasket kit included; Diesel Power Source's Complete Manifold Kit bundles multi-layer gaskets.

A sensible fit for 2019-2024 RAM 2500/3500 owners who value thermal-expansion accommodation, EGR-system support, and a gauge-ready sensor port. Its stated pickup-year range is the key boundary to observe.

Listed on Amazon as: Exhaust Manifolds for 6.7L Cummins 2019-2024 RAM 2500/3500 Pickup by BD Diesel

#2 · Best Hardware Bundle

2. Diesel Power Source T4i Manifold

Best for: Hardware-included 2007-2018 replacement.

Why it ranks #2: Designed for 6.7L RAM 2500/3500 trucks, it lists direct-fit dimensions, mounting hardware and premium gaskets for a more complete replacement.

Included mounting hardware and premium gaskets make this Diesel Power Source T4i manifold a more installation-complete option for specified 2007.5-2018 Dodge Ram 2500/3500 6.7L Cummins trucks. Exact OEM mounting dimensions and bolt patterns are stated to support direct-replacement fitment across manual and automatic transmissions.

The specified OEM mounting dimensions and bolt patterns support fitment planning, while compatibility with both manual and automatic transmissions broadens its stated application within the listed trucks. Included mounting hardware and premium gaskets give installers key components in the package rather than requiring separate sourcing for those items. High-grade cast iron is described as withstanding extreme exhaust temperatures and thermal cycling. The listing also says clearances are maintained for accessories, wiring harnesses, and heat shields, relevant to a replacement installation.

Skip it if you need a listed 2019-2024 RAM 2500/3500 application; BD Diesel's thick-wall manifold specifies those pickup years.

A strong match for 2007.5-2018 Ram 2500/3500 6.7L owners wanting mounting hardware and gaskets included. Confirm that your truck falls within the stated years and transmission compatibility before planning the replacement.

Listed on Amazon as: Diesel Power Source T4i Cast Iron Exhaust Manifold for 2007-2018 Dodge Ram

#3 · Best Gasket Kit

3. Diesel Power Source Manifold Kit

Best for: Complete manifold-and-gasket kit.

Why it ranks #3: This 6.7L RAM manifold bundle combines a cast-iron manifold with multi-layer gaskets, including a 4G gasket, for buyers sourcing installation parts together.

A cast-iron high-flow manifold arrives with a multi-layer gasket kit, including a 4G gasket, making this Diesel Power Source bundle a one-package option for 2007-2018 Dodge Ram 6.7L Cummins installation planning. The matched components reduce the need to source the listed gasket pieces separately.

The kit combines the manifold and multi-layer gasket components for the stated 2007-2018 application, helping buyers coordinate parts for a manifold replacement through one package. Its direct-fit positioning is specific to 6.7L Cummins Ram models in that year range, a useful boundary when checking vehicle fitment. The cast-iron manifold is described as high-flow, while the gasket bundle supports an installation workflow with the listed sealing components on hand. The provided facts do not detail mounting hardware.

Skip it if you need stated turbo and EGR mounting studs; BD Diesel's 2019-2024 RAM 2500/3500 manifold includes both.

This kit suits 2007-2018 Dodge Ram 6.7L Cummins owners who want the manifold and listed gasket components bundled for a replacement. Its stated year range and unspecified hardware define the fit and preparation boundaries.

Listed on Amazon as: Diesel Power Source Complete Manifold Kit: Cast Iron Exhaust Manifold + Multi-Layer Gaskets for 2007-2018 Dodge Ram 6.7L Cummins – Direct Fit High Flow Performance Bundle for Lower EGTs

#4 · Best Slip-Joint Option

4. BD Diesel 1045965

• Weight: 26.8 lb

Best for: Larger-port 6.7L replacement.

Why it ranks #4: Its listing specifies Dodge 6.7L applications and describes a thick-walled silicon ductile iron casting with integral slip joint and pre-drilled pyrometer probe ports.

Larger porting than other designs is the defining feature claimed for this BD Diesel 1045965 manifold, with the listing saying it can handle increases in power. It covers Dodge 6.7L applications across stated 2007.5-2017 years and includes a pre-drilled port for pyrometer probes.

The larger porting is presented as a way to accommodate increased power, while the thick-walled silicon ductile iron casting is specified for extreme temperature cycling. An integral slip joint is also listed, adding a construction detail relevant to thermal movement. Pre-drilling for pyrometer probes supports temperature-monitoring installation. The description gives Dodge 6.7L fitment spanning 2007.5-2017, but gaskets are sold separately, so buyers should include that component in their installation planning.

Skip it if you need the more recent 2019-2024 RAM 2500/3500 pickup fitment; BD Diesel's thick-wall slip-joint manifold lists those years.

Consider this manifold for Dodge 6.7L owners within the stated 2007.5-2017 range seeking larger porting, a slip joint, and pyrometer-probe preparation. Its gasket separation is a practical installation boundary.

Listed on Amazon as: BD Diesel 1045965 Exhaust Manifold

#5

5. BD 1045965 Manifold

• Weight: 26.9 lb

Best for: Holset HE351 stock replacement.

Why it ranks #5: The stock-replacement manifold is listed for the Holset HE351 and uses high-silicon ductile iron; pyrometer drilling is included, but gaskets and bolts are separate.

A stock-replacement configuration for the Holset HE351 turbo makes BD's 1045965 relevant to buyers maintaining a 6.7L Dodge setup rather than selecting a full turbo package. Its high-silicon ductile-iron casting and thick walls address the extreme temperature cycling associated with DPF regeneration.

The casting material is specified to withstand temperature cycling during DPF regeneration, while the thick-walled construction supports that same high-heat use case. A pre-drilled port provides for pyrometer probe installation, helping owners add exhaust-temperature monitoring without relying on an unprepared manifold. The product is described as a 6.7L stock-replacement manifold for the Holset HE351 turbo. Gasket, bolt, and spacer kits are available separately, so installation parts are not all bundled with the manifold.

Skip it if you need a listed 2007.5-2015 application and larger porting for increased power; BD Diesel's 1045965 listing includes those details.

A fit for owners maintaining a 6.7L Dodge with a Holset HE351 who want a stock-replacement manifold and pyrometer-probe provision. Plan for gasket, bolt, and spacer kits separately, and verify the application details.

Listed on Amazon as: EXHAUST MANIFOLD – DODGE

#6

6. BD Screamer Turbo Package

• Weight: 80 lb

Best for: Modified-engine turbo upgrade.

Why it ranks #6: This stock-location package fits RAM 6.7L applications and supports modifications up to 690 horsepower, but it is a broader turbo-performance package, not a simple manifold swap.

Support for engine modifications up to 690 horsepower sets this BD Diesel Screamer package apart from a stock-replacement manifold. For 2013-2018 RAM 6.7L Cummins applications using the Holset HE351 turbo, it combines enhanced porting with a Ballistic Billet compressor wheel and Low MOI QST turbine wheel.

The enhanced porting is specified to increase power handling, while the high-silicon ductile iron casting is described as resistant to extreme heat. BD Diesel says the larger compressor wheel and low-inertia turbine wheel reduce backpressure and improve response and turbine flow, supporting its stated modified-engine focus. The package installs in the stock location and is pre-drilled for a pyrometer probe. Gasket, bolt, and spacer accessory kits are sold separately, so installation planning must account for them.

Skip it if you want a stock-replacement manifold without a turbo-upgrade focus; BD's 1045965 is listed for stock-replacement use with the Holset HE351.

This package fits 2013-2018 RAM 6.7L owners pursuing modified-engine power handling with a Holset HE351. Its stock-location installation is useful, but buyers should plan separately for the listed accessory kits.

Listed on Amazon as: Screamer Turbo Manifold Package for RAM 6.7L Cummins 2013-2018 by BD Diesel

#7

7. A-Premium 6.7L Manifold

• Weight: 22 lb

Best for: Cab-and-chassis Ram replacement.

Why it ranks #7: Stainless-steel construction and direct-replacement fitment suit specified RAM 3500, 4500 and 5500 chassis applications, but the fitment is narrower than general pickups.

Stainless-steel construction and specific cab-and-chassis fitment distinguish this A-Premium manifold, which covers Ram 3500, 4500, and 5500 applications across listed 2013-2018 model years, plus the 2020 Ram 5500. It is a standard-replacement, direct-fit part with a round port shape.

The fitment list identifies L6 6.7L engines in Ram 3500 cab and chassis, 4500, and 5500 models from 2013-2018, as well as the 2020 5500 with ETN engine design. That specificity helps narrow the application beyond a general 6.7L description. Stainless steel is the stated material, and direct-replacement fitment supports a replacement workflow. The package contains one manifold, while the specifications explicitly state that a heat shield is not included.

Skip it if you need a supplied heat shield; BD Diesel's 2019-2024 RAM 2500/3500 manifold lists thick-wall casting and included mounting studs.

Consider this for owners of the listed Ram 3500 cab-and-chassis, 4500, or 5500 L6 6.7L applications seeking a direct replacement. Its fitment is specific, and buyers must account for the absent heat shield.

Listed on Amazon as: A-Premium [L6 6.7L] Exhaust Manifold Compatible with Ram

#8

8. RDLIFT-PART 3976789

• Weight: 15 lb

Best for: Multi-engine Cummins replacement.

Why it ranks #8: It lists compatibility with several Cummins engine families, including QSB6.7 and ISB 6.7L, but provides no specific RAM truck fitment.

Compatibility across several Cummins engine families is the defining feature of this RDLIFT-PART manifold, giving buyers more application options than a listing limited to one RAM model range. Its verified fitment includes QSB6.7 and ISB 6.7L engines, alongside several 5.9L applications.

The listed compatibility covers 6B5.9, B4.5, B6.7 CM2880 B191G, ISBE4 CM850, QSB5.9 CM2880 B115, and multiple QSB6.7 configurations. That range can help equipment owners identify a replacement for several Cummins platforms from one listing. The product is identified as manifold 3976789, which gives buyers a specific reference point when matching an existing part. The supplied facts do not identify included gaskets or mounting hardware, so installation parts may need separate planning.

Skip it if you need a RAM pickup year range and included installation hardware; BD Diesel's 2019-2024 RAM 2500/3500 manifold lists those details.

A practical candidate for buyers servicing one of the specifically listed Cummins engine families, particularly QSB6.7 or ISB 6.7L applications. Check your engine configuration carefully; the listing does not give a RAM pickup year range.

Listed on Amazon as: Exhaust Manifold 3976789 Compatible for Cummins Engine QSB6.7 6B5.9 QSB5.9 ISB 6.7L