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Build your custom headers with a 4-inch outlet
For a fabrication project that calls for a 4-inch collector outlet, Kooks WK2880 supplies the bends and collectors together. You get twelve 2-1/8-inch 304 stainless J-bends and two collectors to shape the headers around your installation.
SKU: WK2880
Match the collector to the rest of the exhaust
The kit includes twelve JB-213-30-18-304 bends and two 9911S collectors. It shares the 2-1/8-inch tube size with the smaller-outlet kit, while the 4-inch collector lets you plan a different downstream exhaust diameter.
Add the correct cylinder-head flanges
Two header flanges are required separately. Choose the port and bolt pattern for your heads, then have the fabricator establish the tube routing and clearance before welding the final assembly.
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 |
|---|---|
| SKU | WK2880 |
| Application | Weld-up custom header fabrication |
| Primary tube diameter | 2-1/8-inch |
| Collector outlet diameter | 4-inch |
| Included bends | Twelve JB-213-30-18-304 J-bends |
| Included collectors | Two 9911S collectors |
| Header flanges | Two flanges required; purchased separately |
| Material | 304 stainless steel |
Frequently asked questions
What is the difference from WK2850?
WK2880 uses 4-inch-outlet collectors. WK2850 uses 3-1/2-inch-outlet collectors; both kits use 2-1/8-inch J-bends.
How many bends and collectors are supplied?
Twelve JB-213-30-18-304 J-bends and two 9911S collectors. Two cylinder-head flanges are separate purchases.
