Exhaust Systems, Headers, Pipes and Hardware

Exhaust system types

The exhaust carries gases from the cylinder head to the tailpipe, and each segment is sold separately or as a kit. Knowing which segment you are replacing keeps the search short.

• Headers replace the restrictive factory manifold with individual tubes per cylinder.
• Cat-back systems replace everything from the catalytic converter rearward: pipe, muffler and tips.
• Axle-back systems replace only the muffler section and change sound the most for the least work.
• Mufflers, resonators and tips can be swapped individually to tune tone or appearance.

Material and construction

Aluminized steel is the economical choice and resists rust in dry climates. Stainless steel, often 304 grade, resists corrosion better and lasts longer where roads are salted. Mandrel-bent tubing keeps a consistent diameter through bends, which helps flow compared with crush-bent pipe. Check the material field on the product listing, as the sample listings do.

Sound and performance expectations

Exhaust upgrades change tone more reliably than power. Any gains are generally modest on an otherwise stock engine and are strongest when paired with other intake or tuning changes. Muffler design affects loudness and drone at highway speed, so read descriptions for the intended sound level. Single-side or dual-rear exits also change fit and appearance.

Emissions and legal points

Catalytic converters are emissions equipment. Federal rules prohibit removing or defeating them, and some states, including those that follow California standards, require specific approved parts or an executive order number. Noise limits also vary by state and city. Check the product details and your local regulations before choosing.

Installation notes

• Confirm engine, cab and bed configuration, wheelbase and model year, since routing differs.
• Replace gaskets, clamps and hangers when you replace pipe.
• Allow clearance from the fuel tank, brake lines and body panels, and let the system cool before handling.
• Penetrating oil on old fasteners saves time, and a professional exhaust shop can handle welding or cutting.

Use clamps only where intended and tighten to the instructions' specification. After installing, check for leaks at each joint with the engine running.

Pairing parts and avoiding mistakes

Pipe diameter should suit the engine's output. Too small a pipe restricts flow, while a much larger one can reduce exhaust velocity and low-end response. Most trucks work well with the diameter the manufacturer of a cat-back system specifies for that engine, so stick to vehicle-specific kits unless you are building a custom system.

• Hangers and isolators should keep the system a few inches from the frame and body. Rubber hangers that sag can let pipes rattle.
• Clamps come as band, U-bolt and V-band styles. Band clamps seal better on slip joints than U-bolt types, which can crush the pipe.
• Spacers and adapters help when joining pipes of different diameters or aligning flanges, but check that the gasket surface is flat.
• Oxygen sensors must be reinstalled in their original bungs, and wiring should be kept away from the hot pipe.

Inspect the system for cracks, loose hangers and blown gaskets once a year. A ticking noise on cold start often points to a leak at the manifold or a flange gasket.