Kooks 2-1/4in x 4in 304 Stainless Slip-On Header Collector 4-Into-1

SKU: ksh9912S UPC: 842422144135
In stock
Backordered From Supplier – Call for Availability

⚠ Call for Availability

This item may be on backorder. Please contact us to confirm supplier availability and estimated lead time before ordering.

Call: (503) 662-9752 | Email Us: info@dfispdx.com

Regular price $300.55

Have a question about this part? We'll answer it.

Verified Fitment & Application Support

This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.

Compliance & Restrictions
California Proposition 65 (Prop 65)
WARNING: This product can expose you to chemicals which is known to the State of California to cause cancer and/or reproductive harm. For more information, visit www.P65Warnings.ca.gov.
CARB / California Emissions Compliance
This item may be restricted in California and other regions with emissions regulations. If applicable, it is intended for competition/off-road use only unless otherwise stated. It is the customer’s responsibility to confirm local compliance before purchase. Orders shipping to restricted areas may be canceled.

This is the large-tube end of the Kooks slip-on collector range: four 2-1/4 inch inside diameter inlets feeding a 4 inch outside diameter outlet, all in 304 stainless steel. A/B style tabs are included to hold the slip joint together.

Key Features

  • 4-into-1 slip-on collector design
  • 2-1/4 inch inside diameter inlets slip over 2-1/4 inch primaries
  • 4 inch outside diameter outlet
  • 304 stainless steel construction
  • Kooks patented scavenging spike
  • Two A/B style tabs included
  • Sold individually

Product Details

  • Brand: Kooks Headers & Exhaust
  • Manufacturer Part Number: 9912S
  • Material: 304 stainless steel
  • Inlet: 2-1/4 in ID (x4)
  • Outlet: 4 in OD
  • Style: slip-on, 4-into-1
  • Manufactured in the USA

Shipping Height: 6.0

Shipping Length: 6.0

Shipping Width: 6.0

Rebuilt by Techs Who Only Do Diesel

Injectors, pumps, and turbos, serviced by people who've been doing this for decades — not a parts counter with a catalog.

Get A Quote