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.
Finish your 6.2-litre header upgrade with the correct Y-pipe
Connect your Kooks long tube headers to the OEM rear exhaust with a 3" stainless Y-pipe and the 3-1/2" rear outlet for the supported 6.2-litre GM applications. Choose Competition Only, Performance or GREEN catalysts, with the fitting clamps supplied.
SKUs: 28633100, 28633200, 28633300
The 6.2-litre rear interface
These pipes use a ball-and-socket header connection and a 3-1/2" OEM rear outlet. The supplied clamps secure the front pipework, while the OEM hardware is reused at the rear connection. The 5.3-litre Y-pipes have a different rear outlet size.
Choose the catalyst for your engine
Performance uses the 300-cell standard catalyst specification on these SKUs and is for naturally aspirated use. GREEN uses 400-cell cats and supports forced induction. Competition Only is the uncatted choice for competition use. All require Kooks long tube headers.
Choose your configuration
| SKU | Configuration | Supplied arrangement | Fitting / engine conditions |
|---|---|---|---|
| 28633100 | Model Year: 2019-2023; Engine Size: 6.2L; Cat Type: Comp. Only | Competition Only connection assembly; Clamps included; OEM rear hardware reused | Uncatted; competition use |
| 28633200 | Model Year: 2019-2023; Engine Size: 6.2L; Cat Type: Performance Cats | Performance Cats connection assembly; Clamps included; OEM rear hardware reused | Naturally aspirated only |
| 28633300 | Model Year: 2019-2023; Engine Size: 6.2L; Cat Type: GREEN Cats | GREEN Cats connection assembly; Clamps included; OEM rear hardware reused | Use the SKU-specific vehicle rows below |
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 | Cadillac Escalade | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2021-2023 | Chevrolet Suburban | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2019-2024 | Chevrolet Silverado 1500 LTZ | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2019-2024 | Chevrolet Silverado 1500 High Country | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2020-2024 | Chevrolet Silverado 1500 RST | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2020 | Chevrolet Silverado 1500 LT Trail Boss | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2022-2024 | Chevrolet Silverado 1500 ZR2 | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2021-2023 | GMC Yukon XL | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2019-2024 | GMC Sierra 1500 SLT | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2019-2024 | GMC Sierra 1500 Denali | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2019-2024 | GMC Sierra 1500 AT4 | 6.2L V8 | 28633100, 28633200, 28633300 | |
| 2021-2023 | GMC Yukon | 6.2L V8 | 28633100, 28633200, 28633300 |
Intended use
28633100, 28633200: Competition, off-road and track use only. Not for use on public roads.
The competition-use waiver applies to 28633100.
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 | 28633100, 28633200, 28633300 |
| Applications | Listed 6.2L GM 1500 trucks from 2019 and SUVs from 2021 |
| Material | 3" 16-gauge 304 stainless steel |
| Header joint | Ball and socket; matching Kooks long tube headers required |
| Rear outlet | 3-1/2" OEM |
| Catalyst choices | Competition Only; Performance 300 cell; GREEN 400 cell |
| Clamps / hardware | Clamps included; OEM rear hardware reused |
| Performance condition | Naturally aspirated only |
Frequently asked questions
Is this the same rear outlet as the 5.3-litre version?
The 6.2-litre pipes have a 3-1/2" OEM outlet. The corresponding 5.3-litre pipes use 2-3/4".
Can I fit it under the factory manifolds?
These Y-pipes require matching Kooks long tube headers.
