Kooks Headers Long Tube Headers 3520H420

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Part Number: KOK-3520H420

$4,387.88

Headers, Long Tube, Stainless Steel, 1.875 in. Primary Tubes, 3.00 in. HIFLO Catted Y-Pipe, Ram, 1500, 5.7L, Kit
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Kooks Headers Long Tube Headers 3520H420

Kooks Headers Long Tube Headers 3520H420

KOK-3520H420

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Part Number: KOK-3520H420

Estimated Ship Date: Dec 21, 2026

$4,387.88

Estimated Ship Date: Dec 21, 2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
3520H420
Part Type:
Product Line:
Summit Racing Part Number:
KOK-3520H420
UPC:
842422175009
Header Style:
Long tube one-piece
Header Material:
304 stainless steel
Primary Tube Outside Diameter (in.):
1 7/8 in.
Header Color:
Natural
Flange Style:
Standard
Weld-Up:
No
Collector Attachment:
2-bolt flange
Collector Diameter (in.):
3.00
Collector Reducers Included:
Yes
Collector Reducer Exit Diameter:
3.000 in.
Tuned:
No
Primary Tube Gauge:
16-gauge
Flange Thickness (in.):
0.38 in.
Bolts/Studs Included:
Yes
Gaskets Included:
Yes
Crossover Pipe Included:
Yes
Crossover Pipe Style:
Y-pipe
Crossover Pipe Diameter:
3.000 in.
Catalytic Converter(s) Included:
Yes
Catalytic Converter Quantity:
2
Motor Mounts Included:
No
Transmission Mount Included:
No
Quantity:
Sold as a pair.
Notes:
Connects to OEM exhaust with 2-bolt flange. Includes HIFLO catted Y-pipes.

Kooks Headers Long Tube Headers

Kooks Headers long tube headers are heavy-duty and crack-resistant, featuring large diameter stainless steel construction (most applications) with smooth-flowing mandrel-bent tubing. They include gaskets, bolts, and oxygen sensor extensions where required.

Also available as kits with connection pipes, depending on the application, Kooks long tube header kits include individual connection pipes, a Y-pipe, X-pipe, or H-pipe to connect to the exhaust system. X-pipes are used primarily for high-rpm performance and race applications. H-pipes create lower end power and are used on street cars for increased performance with a comfortable sound level.

These connection pipes are offered in three versions:

* Off-road (non-catted) for full track use with no horsepower loss and the loudest exhaust tone
* With high-flow catalytic converters; recommended for street driving with little or no horsepower loss and a deeper exhaust tone
* With Kooks ultra-high performance GREENCATS catalytic converters; designed for naturally aspirated and forced induction engines up to 900 hp, eliminates most "Check Engine Light" warnings

Note: Kooks Headers long tube headers and connection pipes may not be legal for sale, installation, or use in some areas. Check your state and local laws.

Applications

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This product can expose you to chemicals including Chromium and Nickel, which are known to the State of California to cause cancer, birth defects or reproductive harm.

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