Which Performance Upgrades Work Best for Your Ram Truck?

Hemi V8 Upgrades (5.7L / 6.4L Truck Applications)

On a gas Hemi, there's no "delete kit" involved in the diesel sense - that term applies to diesel emissions hardware, not Hemi V8s. Real upgrade categories here are airflow (intake and exhaust), tuning, and bolt-on hardware like valve covers.

Valve Covers: What They Actually Do

A billet aluminum valve cover is a clearance and durability upgrade, not a performance part in the sense of adding power. The stock plastic covers can warp or crack over time on higher-mileage engines, and a taller aluminum cover gives clearance for aftermarket valvetrain components (upgraded rockers, springs) while staying compatible with OEM ignition coils. If you're just looking for a cleaner engine bay and more durable hardware, that's a legitimate reason on its own - just don't expect a horsepower number from it. This particular Gen III Hemi casting is shared across 5.7L, 6.1L, and 6.4L applications - note that 6.1L was never a factory Ram truck engine (it was used in Chrysler 300C SRT8, Dodge Charger/Magnum/Challenger SRT8, and Jeep Grand Cherokee SRT8), so that fitment mainly matters for engine swaps or cross-platform Hemi builds, not a stock Ram. See the Hemi billet aluminum valve covers product page for the full model-by-model fitment table.

Cold Air Intake And Exhaust

A cold air intake and cat-back exhaust are the more likely source of a real, feelable difference on a Hemi - better airflow in and out, improved throttle response, and a different exhaust note. On a naturally aspirated factory Hemi, don't expect a large, easily measurable power gain from intake and exhaust alone; the difference is more noticeable in sound and throttle feel than on a dyno sheet. Confirm compatibility for your specific engine and vehicle before ordering. Browse Hemi-applicable performance parts filtered by your engine size.

Tuning

A tune adjusts fuel delivery and ignition timing and is where the most noticeable gains usually come from on a gas Hemi - but it's also where octane requirements, knock control, engine year, and transmission calibration all matter, and where mismatched hardware or an unqualified install can cause real engine damage. Have a qualified shop handle tuning rather than treating it as a DIY afterthought.

6.7L Cummins Diesel Upgrades (Ram 2500/3500 HD)

On the diesel side, "delete kit" refers to removing DPF, EGR, or related emissions hardware and replacing it with an open exhaust section - this is fundamentally different from anything on the Hemi and carries real legal weight.

Legal And Compliance Notes

Public-road diesel trucks are required to keep emissions equipment functional under the Clean Air Act. The EPA states that there is no exemption for a vehicle used only off-road or only for racing, and no legal pathway to convert an EPA-certified vehicle into a competition-use vehicle exempt from the tampering prohibition - a narrow area of enforcement discretion exists only for a vehicle permanently converted to competition use and never driven on public roads, which is a much narrower category than a general "off-road build." For a street-driven Ram Cummins, the compliant path is diagnosis, cleaning, repair, or replacement rather than delete hardware. See our DPF delete cost and repair comparison guide for that decision.

Fitment Example

For reference, one current fitment example is a 4"/5" DPF delete race pipe for late-model Ram 2500/3500 6.7L Cummins Diesel - confirm the exact model-year range and cab/bed configuration on the current listing before ordering, since fitment details can change between production runs. A delete pipe alone isn't the whole job - the ECM still expects a working DPF/EGR system, so a matched tuner is required to avoid fault codes and limp mode. Browse the full Cummins DPF delete pipe collection to compare pipe diameter and exhaust configuration options.

Intake And Intercooler

A cold air intake and intercooler pipe upgrade are lower-risk additions that don't touch emissions equipment. These can improve airflow and reduce heat soak under towing load, independent of any delete decision.

FAQ

Q: Are valve covers a type of delete kit?

A: No. Valve covers are a clearance and durability upgrade for the engine's valvetrain - they don't remove emissions equipment or add power on their own. "Delete kit" specifically refers to removing diesel emissions hardware like the DPF or EGR system.

Q: Do Hemi and Cummins Ram trucks use the same performance upgrades?

A: No. They're different engine families with different upgrade categories, parts, and legal considerations. A Hemi gas engine has no emissions-delete category the way a diesel does; a Cummins diesel does, and that category carries real legal weight on a street-driven truck.

Q: Is a DPF/EGR delete legal on a street-driven Ram Cummins?

A: Removing or disabling required emissions equipment on a public-road truck creates real legal and inspection risk under the Clean Air Act, regardless of how the parts are marketed. See the legal section above.

Q: Do I need a tune after a diesel delete pipe?

A: Yes. Without a matched tuner, the ECM still expects a working DPF/EGR system and will set fault codes or trigger limp mode.

Q: Will a cold air intake alone make a noticeable difference?

A: It depends on how restrictive your factory setup was. On both Hemi and Cummins platforms, intake gains are usually modest on their own and more noticeable when paired with exhaust and, on the Hemi, tuning.

Q: Can I mix and match upgrades across categories?

A: Some parts do cross-fit - for example, the same valve cover casting covers 5.7L, 6.1L, and 6.4L Hemi applications. Others, like intake systems, are specific to engine bay and vehicle. Confirm compatibility by exact part, not just by displacement, and know that diesel parts never cross over to gas trucks.