Best Exhaust Manifold For 6 7 Cummins: Compare 10 Options

#1 · Best Overall

1. Diesel Power Source T4i Manifold

Best for: Hardware-and-gasket direct replacement.

Why it ranks #1: Designed for 2007.5–2018 Ram 2500/3500 6.7L trucks, with OEM mounting dimensions, transmission clearance, mounting hardware, and premium gaskets listed.

Exact OEM mounting dimensions and bolt patterns are the central advantage of this Diesel Power Source T4i manifold. Listed for 2007.5–2018 Ram 2500 and 3500 trucks with 6.7L Cummins engines, it also includes mounting hardware and premium gaskets, helping buyers assemble key replacement parts together.

The stated OEM mounting dimensions and bolt patterns support direct-replacement fitment, while compatibility with manual and automatic transmissions addresses two common configuration differences in the listed trucks. The description says clearances are maintained for accessories, wiring harnesses, and heat shields, which helps preserve surrounding installation space. Included mounting hardware and premium gaskets reduce separate parts gathering. High-grade cast iron is identified as able to withstand extreme exhaust temperatures and thermal cycling; the stated vehicle range remains 2007.5–2018 Ram 2500/3500.

Skip it if you own a 2019–2024 Ram 2500 or 3500; the BD Diesel manifold with split-pulse architecture is listed for those later pickups.

A compelling fit for 2007.5–2018 Ram 2500/3500 owners who want hardware and gaskets included and need transmission flexibility. Its stated year range is the boundary, so later pickups require a different listed application.

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

#2 · Best Newer Ram Fit

2. BD Diesel 2019–2024 Manifold

Best for: Thermal-stress-conscious late Ram.

Why it ranks #2: Specifically fits 2019–2024 Ram 2500/3500 pickups and lists thick-wall construction, a slip-joint center section, and turbo and EGR studs.

A slip-joint, two-piece construction lets this BD Diesel manifold accommodate thermal expansion, addressing a key stress point in a high-heat exhaust system. Listed for 2019–2024 Ram 2500 and 3500 pickups, it pairs that movement-friendly design with thick-wall casting and split-pulse architecture for buyers seeking a direct-swap performance-oriented replacement.

The thick-wall casting is specified for high-heat durability, while the slip-joint center section permits natural thermal expansion to reduce stress and help avoid breakage. Split-pulse architecture is intended to enhance exhaust flow for improved turbo response and power. For installation, the OEM-style direct swap supports the complete EGR system, and supplied turbo and EGR studs provide secure mounting points. The application is limited in the listing to 2019–2024 Ram 2500/3500 pickups.

Skip it if you own a 2007–2018 Ram 2500 or 3500; the BD Diesel 1046065 kit is listed for that earlier range.

A strong match for owners of listed 2019–2024 Ram 2500 or 3500 pickups who value thermal-expansion accommodation and supplied mounting studs. Its stated application window is the key fit boundary, so earlier trucks need another option.

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

#3 · Best 2007–2018 Kit

3. BD Diesel 1046065 Kit

• Weight: 30.1 lb

Best for: 2007–2018 Ram pickup kit.

Why it ranks #3: The listing identifies a manifold kit for Ram 2500 and 3500 pickups from 2007–2018, making its stated vehicle fit particularly clear.

The BD Diesel 1046065 kit is listed for 2007–2018 Ram 2500 and 3500 pickups, giving owners of those specified trucks a clearly bounded manifold-kit option. Its vehicle range is the key differentiator: it helps buyers focus on the stated pickup applications instead of assuming broad fitment across every 6.7L Cummins vehicle.

This is a BD Diesel exhaust manifold kit, model 1046065, with compatibility stated for Ram 2500 and Ram 3500 from 2007 through 2018. That defined range supports a more focused application check for pickup owners, while the kit format identifies it as a manifold replacement package rather than a standalone manifold listing. The supplied information gives a 30.1-pound item weight, which is useful when planning handling, but does not specify included gaskets, fasteners, or installation instructions.

Skip it if you need stated gasket and fastener contents; the Diesel Power Source complete kit explicitly includes manifold gaskets.

Consider this BD Diesel kit if your application is a Ram 2500 or 3500 pickup within the listed 2007–2018 range. Its boundary is that supplied details do not itemize installation contents, so confirm what the job requires separately.

Listed on Amazon as: Dodge 2500/3500 Pick-Up Exhaust Manifold Kit by BD Diesel Performance

#4 · Best Complete Kit

4. Diesel Power Source Complete Kit

Best for: Complete gasket-included installation kit.

Why it ranks #4: Combines a cast-iron manifold with multi-layer gaskets for 2007–2018 Dodge Ram 6.7L Cummins applications in one listed package.

This Diesel Power Source package combines a high-flow cast-iron manifold with a multi-layer gasket kit, including a 4G gasket. For 2007–2018 Dodge Ram 6.7L Cummins applications, that bundled approach can simplify parts gathering for an installation by putting the manifold and specified gasket components together.

The cast-iron manifold and multi-layer gasket kit are presented as a complete package for the stated 2007–2018 6.7L Cummins application. Having those named components together reduces the need to source the listed gasket components separately and keeps the package focused on manifold installation. The product description also calls the manifold high-flow and positions it for lower EGTs, though the supplied details provide no measured flow or temperature figures. Check the stated vehicle years and engine application before selecting it.

Skip it if you need documented mounting studs and fasteners in the package; the BD Diesel 2019–2024 manifold listing specifies turbo and EGR studs.

A useful choice for 2007–2018 Dodge Ram 6.7L Cummins owners who want a manifold and gasket components in one package. Its stated model-year range is the fit boundary, and fastener contents are not detailed.

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

#5

5. BD Diesel 1045965 Manifold

• Weight: 26.9 lb

Best for: HE351 stock-replacement manifold.

Why it ranks #5: Listed as a 6.7L stock-replacement manifold for the Holset HE351, with a high-silicon ductile iron casting and pre-drilled pyrometer probe ports.

A thick-walled high-silicon ductile iron casting is the core feature of this BD 1045965 stock-replacement manifold for 6.7L applications using a Holset HE351 turbo. Its pre-drilled pyrometer-probe provision also gives gauge users a defined mounting point without describing a separate drilling step.

The listing connects high-silicon ductile iron with resistance to extreme temperature cycling during DPF regeneration, while thick-wall construction adds material around the manifold. As a stock-replacement design for use with the Holset HE351, it keeps the stated application focused. The pre-drilled probe provision supports pyrometer installation, but gasket, bolt, and spacer kits are available separately. Buyers should account for those parts when planning the replacement rather than assuming they come with the manifold.

Skip it if you want the gasket kit bundled with the manifold; the Diesel Power Source 2007–2018 kit includes multi-layer gaskets.

Consider this BD manifold if you need a stock replacement for a listed 6.7L Holset HE351 setup and want a pre-drilled pyrometer port. Separate installation kits and the specified turbo are the key boundaries.

Listed on Amazon as: EXHAUST MANIFOLD – DODGE

#6

6. BD Diesel 1045965 Exhaust Manifold

• Weight: 26.8 lb

Best for: Slip-joint 2007.5–2017 replacement.

Why it ranks #6: The listing specifies Dodge 6.7L applications from 2007.5–2017, a thick-walled casting, an integral slip joint, and gaskets sold separately.

An integral slip joint and thick-walled silicon ductile iron define this BD 1045965 manifold, listed for Dodge 6.7L applications from 2007.5 through 2017. The design also has larger porting and pre-drilled pyrometer-probe provisions, combining replacement fitment with features aimed at heat cycling and gauge installation.

The silicon ductile iron is specified to withstand extreme temperature cycling, while the thick-walled casting and integral slip joint address the manifold’s demanding heat environment. Larger porting is described as able to handle power increases, and pre-drilled probe locations support pyrometer installation. Gaskets are sold separately, which affects parts planning. The supplied application identifies Dodge 6.7L models from 2007.5–2017, so buyers should keep that stated window in view when selecting this replacement.

Skip it if you need gaskets included in the package; the Diesel Power Source complete kit includes a multi-layer manifold gasket kit.

A suitable candidate for Dodge 6.7L owners within the listed 2007.5–2017 range who want the slip-joint design and pyrometer provision. Its gasket exclusion and stated year window set practical limits for the replacement.

Listed on Amazon as: BD Diesel 1045965 Exhaust Manifold

#7 · Best Turbo Upgrade

7. BD Screamer Turbo Package

• Weight: 80 lb

Best for: Modified-engine turbo package.

Why it ranks #7: Fits 2013–2018 Ram 6.7L applications and supports listed modifications up to 690 HP, with the gasket, bolts, and spacers sold separately.

The BD Screamer package supports engine modifications up to 690 horsepower, pairing a high-silicon ductile iron manifold with a Ballistic Billet compressor wheel and Low MOI QST turbine wheel. Listed for 2013–2018 RAM 6.7L Cummins with a Holset HE351 Turbo, it targets a performance-oriented use case.

The larger Ballistic Billet compressor wheel and Low MOI QST turbine wheel are described as reducing backpressure and improving response, efficiency, and turbine flow. The manifold’s enhanced porting is intended to handle increased power, with the stated support reaching up to 690 horsepower. A pre-drilled pyrometer probe port simplifies gauge installation, and the package uses stock-location installation. Accessory kits containing gaskets, bolts, and spacers are sold separately, so installation parts require additional planning.

Skip it if you want gaskets, bolts, and spacers included; the Diesel Power Source complete kit includes a manifold gasket kit.

A fit for 2013–2018 RAM 6.7L Cummins owners running a Holset HE351 and seeking the stated higher-power capability. The separate accessory kits and specified turbo application are important limits for installation planning.

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

#8

8. A-Premium 6.7L Manifold

• Weight: 22 lb

Best for: Cab-and-chassis Ram replacement.

Why it ranks #8: Lists fitment for Ram 3500, 4500, and 5500 Cab & Chassis applications across specified configurations, with stainless steel construction.

Stainless-steel construction and a listed fit for Ram 3500, 4500, and 5500 applications distinguish this A-Premium manifold. The specified years center on 2013–2018 trucks, with a separate 2020 Ram 5500 entry, giving cab-and-chassis buyers a more precise application range than a general 6.7L listing.

The fitment information covers Ram 3500, 4500, and 5500 with L6 6.7L engines, including cab-and-chassis designation for the 3500 and the stated 2020 5500 application. Stainless-steel construction and a round port shape identify the replacement’s material and outlet geometry, while the direct-replacement fitment type clarifies its intended role. The listing specifies one manifold and no heat shield, so buyers planning a replacement should account for that stated configuration during parts preparation.

Skip it if you require an included heat shield; this A-Premium listing explicitly specifies none.

Suitable for buyers whose Ram 3500, 4500, or 5500 6.7L application matches the listed years and engine details. The stainless-steel direct replacement is a focused option, but the no-heat-shield specification is an important boundary.

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

#9

9. RDLIFT-PART 3976789 Manifold

• Weight: 15 lb

Best for: Multi-platform Cummins replacement.

Why it ranks #9: Lists compatibility with several Cummins engines, including QSB6.7 and ISB 6.7L, but does not specify a particular Ram truck fitment.

Compatibility across QSB6.7, QSB5.9, ISB 6.7L, and several other listed Cummins engines is the defining feature of this RDLIFT-PART manifold. That range gives buyers working across supported engine families a single named replacement option, while the detailed engine list helps narrow the application before purchase.

The listing names QSB6.7 CM2150 B109, QSB6.7 CM2880 B116, ISBE4 CM850, and multiple other engine variants, making its compatibility information the main practical value. Buyers can compare their engine designation against the supplied list rather than relying on a broad Cummins label alone. The manifold weighs 15 pounds and measures 24 by 18 by 10 inches, useful details for planning handling and space during parts staging; no gasket or mounting hardware is specified.

Skip it if you need a kit explicitly listing installation gaskets or hardware; this listing identifies the manifold but not those components.

A practical candidate for buyers matching one of the listed Cummins engine codes, especially QSB6.7 or ISB 6.7L applications. Treat the engine-specific compatibility list as the boundary, and plan separately for any installation parts not identified here.

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

#10

10. BD 1043007 Manifold Kit

• Weight: 24.8 lb

Best for: Ford 6.7L thick-wall repair.

Why it ranks #10: Its description identifies a Ford 6.7L manifold failure application, not a Cummins fitment, so it is not a suitable match for this search.

A 0.275-inch thick-walled Hi-Silicon ductile casting sets this BD 1043007 manifold kit apart, with the listing describing it as 75% thicker to combat cracking in Ford 6.7L exhaust manifolds. That makes it relevant to buyers addressing the Ford failure described here, not a verified Cummins-specific choice.

BD identifies the manifold as a response to common Ford 6.7L failures, using a heavy-duty 0.275-inch Hi-Silicon ductile casting intended to resist cracking under high exhaust temperatures. The description also mentions improved thermal durability. Bolt-on installation is listed, which clarifies the mounting approach, while fitment is described only as covering multiple makes and models with compatibility information available from the seller. The supplied facts do not establish fitment for a Cummins application.

Skip it if you need a confirmed Cummins manifold; the BD Diesel 1046065 kit is listed for 2007–2018 Ram 2500 and 3500 pickups.

This is a Ford-focused option for buyers addressing the listed 6.7L manifold cracking issue and seeking a bolt-on kit. It is not a verified choice for the Cummins roundup, so application confirmation is essential before selection.

Listed on Amazon as: BD Diesel 1043007 Exhaust Manifold Kit Incl. Manifold/Cross Over Tube/EGR Port High Temp Black Coated Exhaust Manifold Kit