1 2

Wehrli

Wehrli 11-16 Duramax LML Stainless 2in Up Pipe Kit w/ Gaskets

Wehrli 11-16 Duramax LML Stainless 2in Up Pipe Kit w/ Gaskets

$704.99 USD
$709.00 USD $704.99 USD
Sale Sold out
Shipping calculated at checkout.

Shipping & returns

Orders over $99 ship free in the lower 48. Most in-stock gear leaves the warehouse the next business day. Wrong fitment? Send it back within 30 days — we'll help you find the part that does fit.

Fitment & build help

Not sure if this fits your platform? Tell us your year, make, model, and trim — we'll confirm before you order. For bigger builds, we'll help you plan the full stack.

Warranty

Every product on this site ships through authorized channels with full manufacturer warranty. If something breaks in normal use, we'll help you get it resolved.

View full details
Replace the lightweight 16G, leak prone, 1 5/8" OEM driver and passenger side up pipes on your 2011-2016 6.6L LML Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck with this heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Improves exhaust flow which increases turbo spool-up and decreases EGT's. Excellent upgrade for hard working, heavy towing trucks or high performance applications equipped with larger upgraded turbocharger and emissions compliant tuning. Compatible with OEM style exhaust manifolds or WCFab Billet Exhaust Manifold (Part Number WCF100363). INCLUDES GASKETS! - NO Tuning required, bolt on! -Will fit on stock truck no other modifications or upgrades necessary! Replaces the following GM part numbers: 12657012, 12638302, 12644640, 12650925, 12637379. Will not work with aftermarket manifolds which alter the exhaust outlet location. Not compatible with LGH Duramax Equipped Express or Savana models.

This Part Fits:

Year Make Model Submodel
2015-2016 Chevrolet Silverado 2500 HD High Country
2011-2016 Chevrolet Silverado 2500 HD LT
2011-2016 Chevrolet Silverado 2500 HD LTZ
2011-2016 Chevrolet Silverado 2500 HD WT
2015-2016 Chevrolet Silverado 3500 HD High Country
2011-2016 Chevrolet Silverado 3500 HD LT
2011-2016 Chevrolet Silverado 3500 HD LTZ
2011-2016 Chevrolet Silverado 3500 HD WT
2015-2016 GMC Sierra 2500 HD Base
2011-2016 GMC Sierra 2500 HD Denali
2011-2016 GMC Sierra 2500 HD SLE
2011-2016 GMC Sierra 2500 HD SLT
2011-2014 GMC Sierra 2500 HD WT
2015-2016 GMC Sierra 3500 HD Base
2011-2016 GMC Sierra 3500 HD Denali
2011-2016 GMC Sierra 3500 HD SLE
2011-2016 GMC Sierra 3500 HD SLT
2011-2014 GMC Sierra 3500 HD WT

  • Free shipping over $99

    Orders over $99 ship free in the lower 48. Most in-stock gear leaves the warehouse the next business day.

  • Wrong fitment? We make it right.

    If a part doesn't fit your platform the way it should, send it back. We handle the return and find you the part that does.

  • Authorized dealer support

    Every product moves through proper channels. Full manufacturer warranty, real tech support — no gray-market headaches.