Exhaust Gaskets

Exhaust Gaskets: the seal that stops your header leaking before the first mile

An exhaust gasket sits between two exhaust joints - manifold to head, header to turbo, or pipe to flange - and takes up the tiny surface irregularities so hot gas can't escape sideways. Get it wrong and you get a tick that grows into a leak, warped flanges, and false readings at the O2 sensor. Fit a fresh one every time you break a joint, because a used exhaust gasket has already crushed to shape and won't seal a second time. That's why exhaust gaskets are a consumable you buy alongside almost any exhaust work.

What ThreePiece stocks

There are 145 exhaust gaskets in this category right now, spanning manifold gasket sets, tapered donut gaskets, and hardware kits. Prices currently run from $21 to $117 - that's the live range for what's in stock, not a standing offer. Across the range you'll find 22 brands, led by Vibrant (32), Cometic Gasket (27) and BLOX Racing (21), with Turbo XS, HKS, Kooks Headers, Ticon, BD Diesel and TwinPower filling out the rest.

Coverage skews toward tuner and diesel platforms: 37 products carry specific fitment data, with year coverage from 1966 to 2024. Named vehicles include the Subaru WRX and STi, Honda S2000 and Civic, Nissan RB26 and KA24DE, Toyota 2JZGTE and 7MGTE, the Ford Coyote, Hyundai Genesis Coupe, Dodge 6.7L, and Harley-Davidson Big Twin and Sportster.

How to choose

Start with the joint you're sealing. For a turbo build, a multi-layer manifold gasket like the Cometic 2JZGTE two-piece set matches port and thickness to the head. For diesel manifolds, the BD Diesel T4-flange set for the 2007.5-2018 Dodge 6.7L and the 19-24 Ram 6.7L Cummins set cover the whole manifold face in one box. If you want fasteners included, the Ford Racing Coyote gasket and hardware kit ships the studs and nuts with it. For slip-joint pipe connections, a crush donut like the Ticon aluminum 3in donut seals a v-band or flanged pipe. On V-twins, the TwinPower tapered 10-pack gives you spares for repeat pipe swaps. The trade-off is simple: cheaper single gaskets suit a one-off reseal, while multi-piece and hardware kits cost more but save a second trip when you're doing a full manifold.

What else you need with it

Buy the gasket with the part it seals. If you're replacing a header, order the matching gasket at the same time; the same goes for exhaust flanges, exhaust pipes and catalytic converters. Downstream work on a cat-back exhaust or muffler often breaks a joint that needs a fresh seal too. Browse the full exhaust section to line up the rest of the job.

Fitment and ordering

Because gasket sealing surfaces are port- and flange-specific, confirm your engine and flange type before ordering. Call fitment help at 813-535-5801 or reach us through contact us if you're unsure which set matches your manifold. Every order ships free, and Affirm and Katapult financing is available at checkout.

Exhaust Gaskets: the seal that stops your header leaking before the first mile

An exhaust gasket sits between two exhaust joints - manifold to head, header to turbo, or pipe to flange - and takes up the tiny surface irregularities so hot gas can't escape sideways. Get it wrong and you get a tick that grows into a leak, warped flanges, and false readings at the O2 sensor. Fit a fresh one every time you break a joint, because a used exhaust gasket has already crushed to shape and won't seal a second time. That's why exhaust gaskets are a consumable you buy alongside almost any exhaust work.

What ThreePiece stocks

There are 145 exhaust gaskets in this category right now, spanning manifold gasket sets, tapered donut gaskets, and hardware kits. Prices currently run from $21 to $117 - that's the live range for what's in stock, not a standing offer. Across the range you'll find 22 brands, led by Vibrant (32), Cometic Gasket (27) and BLOX Racing (21), with Turbo XS, HKS, Kooks Headers, Ticon, BD Diesel and TwinPower filling out the rest.

Coverage skews toward tuner and diesel platforms: 37 products carry specific fitment data, with year coverage from 1966 to 2024. Named vehicles include the Subaru WRX and STi, Honda S2000 and Civic, Nissan RB26 and KA24DE, Toyota 2JZGTE and 7MGTE, the Ford Coyote, Hyundai Genesis Coupe, Dodge 6.7L, and Harley-Davidson Big Twin and Sportster.

How to choose

Start with the joint you're sealing. For a turbo build, a multi-layer manifold gasket like the Cometic 2JZGTE two-piece set matches port and thickness to the head. For diesel manifolds, the BD Diesel T4-flange set for the 2007.5-2018 Dodge 6.7L and the 19-24 Ram 6.7L Cummins set cover the whole manifold face in one box. If you want fasteners included, the Ford Racing Coyote gasket and hardware kit ships the studs and nuts with it. For slip-joint pipe connections, a crush donut like the Ticon aluminum 3in donut seals a v-band or flanged pipe. On V-twins, the TwinPower tapered 10-pack gives you spares for repeat pipe swaps. The trade-off is simple: cheaper single gaskets suit a one-off reseal, while multi-piece and hardware kits cost more but save a second trip when you're doing a full manifold.

What else you need with it

Buy the gasket with the part it seals. If you're replacing a header, order the matching gasket at the same time; the same goes for exhaust flanges, exhaust pipes and catalytic converters. Downstream work on a cat-back exhaust or muffler often breaks a joint that needs a fresh seal too. Browse the full exhaust section to line up the rest of the job.

Fitment and ordering

Because gasket sealing surfaces are port- and flange-specific, confirm your engine and flange type before ordering. Call fitment help at 813-535-5801 or reach us through contact us if you're unsure which set matches your manifold. Every order ships free, and Affirm and Katapult financing is available at checkout.