Kooks 2014+ GM 1500 Y-Pipes - 28623100, 28623200
Kooks / Exhaust Pipes

Kooks GM 1500 5.3 Y-Pipes (2019-2023)

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£2,183.65 VAT included. Shipping calculated for your destination.

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Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.

Lead times and urgent orders Check timing before you commit

Estimated lead time: 4–6 weeks. Delivery may be faster depending on stock levels. Contact us before ordering if timing matters.

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Technical specifications
Specification Details
SKUs 28623100, 28623200
Applications Listed 2019-2023 GM 1500 5.3L applications
Material 3" 16-gauge 304 stainless steel
Header connection Ball and socket; matching Kooks long tube headers required
Rear outlet 2-3/4" OEM
Choices Competition Only or Performance 300-cell cats
Clamps / hardware Front clamps included; OEM rear hardware reused
Performance condition Naturally aspirated only

Complete your 5.3-litre headers with the correct rear connection

Join your Kooks long tube headers to the 2-3/4" OEM rear exhaust with a stainless Y-pipe for the supported 2019-2023 GM 5.3 applications. Choose Competition Only or Performance cats, with the front clamps included and the OEM rear hardware reused.

SKUs: 28623100, 28623200

The outlet size for the 5.3 application

The Y-pipes use 3" 16-gauge 304 stainless pipework and ball-and-socket header connections. Their rear outlet is 2-3/4", distinct from the 3-1/2" outlet on the corresponding 6.2-litre Y-pipes.

Choose your front catalyst arrangement

Performance cats use a 300-cell substrate and are for naturally aspirated engines. Competition Only supplies the uncatted competition arrangement. Both require matching Kooks long tube headers, purchased separately.

Choose your configuration

SKU Configuration Supplied arrangement Fitting / engine conditions
28623100 Model Year: 2019-2023; Engine Size: 5.3L; Cat Type: Comp. Only Competition Only connection assembly; Front clamps included; OEM rear hardware reused Uncatted; competition use
28623200 Model Year: 2019-2023; Engine Size: 5.3L; Cat Type: Performance Cats Performance Cats connection assembly; Front clamps included; OEM rear hardware reused Naturally aspirated only

Matching products

The GM 1500 long tube headers provide a matching front component. Pair them with the Y-pipe for the engine, vehicle years and rear outlet shown on this page.

Vehicle fitment

Years Vehicle / trim Engine Applicable SKU Fitting conditions
2021-2023 Chevrolet Suburban 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 High Country 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 LT 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 LT Trail Boss 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 Custom Trail Boss 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 RST 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 WT 5.3L V8 28623100, 28623200
2019-2023 Chevrolet Silverado 1500 LTZ 5.3L V8 28623100, 28623200
2019-2022 Chevrolet Silverado 1500 Custom 5.3L V8 28623100, 28623200
2021-2023 Chevrolet Tahoe 5.3L V8 28623100, 28623200
2021-2023 GMC Yukon XL 5.3L V8 28623100, 28623200
2019-2023 GMC Sierra 1500 Elevation 5.3L V8 28623100, 28623200
2019-2023 GMC Sierra 1500 Denali 5.3L V8 28623100, 28623200
2019-2022 GMC Sierra 1500 SLE 5.3L V8 28623100, 28623200
2019-2022 GMC Sierra 1500 SLT 5.3L V8 28623100, 28623200
2019-2021 GMC Sierra 1500 AT4 5.3L V8 28623100, 28623200
2019-2021 GMC Sierra 1500 Base 5.3L V8 28623100, 28623200
2022-2023 GMC Sierra 1500 Pro 5.3L V8 28623100, 28623200
2021-2023 GMC Yukon 5.3L V8 28623100, 28623200

Intended use

Competition, off-road and track use only. Not for use on public roads.

The competition-use waiver applies to 28623100.

Ordering and delivery

Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.

Technical specifications

Specification Details
SKUs 28623100, 28623200
Applications Listed 2019-2023 GM 1500 5.3L applications
Material 3" 16-gauge 304 stainless steel
Header connection Ball and socket; matching Kooks long tube headers required
Rear outlet 2-3/4" OEM
Choices Competition Only or Performance 300-cell cats
Clamps / hardware Front clamps included; OEM rear hardware reused
Performance condition Naturally aspirated only

Frequently asked questions

Do these have the 6.2-litre rear outlet size?

These 5.3 pipes use a 2-3/4" OEM rear outlet.

Are rear OEM fasteners replaced by the supplied clamps?

The front clamps are supplied; the OEM hardware is reused at the rear outlet.

Delivery, customs and taxes

Know the landed cost before you order

Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.

Lead times and urgent orders

Check timing before you commit

Estimated lead time: 4–6 weeks. Delivery may be faster depending on stock levels. Contact us before ordering if timing matters.

Fitment first

Check fit before you order

Model year, engine, drivetrain, hardware and existing modifications can all change what fits. Check the applications and supplier notes above, or send us your exact vehicle and setup before ordering.

Check vehicle fitment
Need help with this product?

Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.

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Kooks GM 1500 5.3 Y-Pipes (2019-2023)
Kooks GM 1500 5.3 Y-Pipes (2019-2023)2019-2023 / 5.3L / Comp. Only
Available to Order £2,183.65