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Wehrli Custom Fab WEHRLI CUSTOM FAB WCF100373 BILLET EXHAUST MANIFOLDS 17 -24 L5P

Fits 2017-2024 6.6L Duramax V8 (L5P) · 6.6L Duramax V8 (L5P, updated)

Wehrli Custom Fab
Headers
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gain
no published figure
price
$1,526.78
at Coyote Direct
install
4/5 difficulty · ~4-8 hrs, shop job for most people
Buy at Coyote DirectAdd to build

where to buy · 3 retailers tracked

  • Coyote Directbest pricechecked Oct 23$1,526.78view
  • MAK Performance Groupchecked Oct 23$1,570.43view
  • XDPchecked Sep 14$1,570.43view

Headers replace the cast exhaust manifolds with tuned tubes so each cylinder has a smoother path out. This one is the Wehrli Custom Fab WEHRLI CUSTOM FAB WCF100373 BILLET EXHAUST MANIFOLDS 17 -24 L5P, listed to fit the 2017-2024 Chevrolet Silverado 2500HD/3500HD with the 6.6L Duramax V8 (L5P) or 6.6L Duramax V8 (L5P, updated).

why this one — This is a long, hot, awkward job on a truck. Budget for a shop and for a tune afterward. Kingz Diesel Supply lists it at $1526.78, and the fitment above is what the listing itself states, not a guess.

Questions about this category

F-150: does anyone publish a horsepower number for headers?
pairs well with
Banks Power Monster Exhaust System, 5in DPF-Back, Chrome TipBanks Power Derringer Tuner (66652)

No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.

Independent site. Not affiliated with, endorsed by, or sponsored by any vehicle manufacturer, parts manufacturer, or retailer named on this site. Vehicle and brand names are used only to describe compatibility. Gains shown are manufacturer claims, community estimates, or independent tests, labeled by source on every part, and are not guarantees.