aFe BladeRunner cold-side intercooler tube for the 2017-2019 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 HD 6.6L L5P Duramax diesel. Built from 3-1/2in mandrel-bent, powder-coated aluminum, it outflows the plastic factory tube while decreasing turbulence and pressure loss to raise horsepower and torque and lower EGTs. It uses factory mounting locations and a 6061-T6 billet aluminum quick-connect adapter with an o-ring seal, plus one 1/8in NPT port for a pressure sensor or water/methanol injection and retention of the factory air-temp sensor. Includes stainless-steel spring-loaded T-bolt clamps and 5-ply silicone couplings pressure tested to 200 psi. Finished in wrinkle black powder coat.
Specifications
| Type | Cold-side intercooler tube (BladeRunner) |
| Material | TIG-welded mandrel-bent aluminum |
| Diameter | 3-1/2 in |
| Finish | Wrinkle black powder coat |
| Couplings | 5-ply silicone with stainless-steel spring-loaded T-bolt clamps (200 psi); 6061-T6 billet quick-connect adapter |
| Port | 1/8in NPT for sensor or water/methanol injection |
| Part Number | 46-20339-B |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2017-2019 | GMC | Sierra 2500 HD | Base |
| 2017-2019 | GMC | Sierra 2500 HD | Denali |
| 2017-2019 | GMC | Sierra 2500 HD | SLE |
| 2017-2019 | GMC | Sierra 2500 HD | SLT |
| 2017-2019 | GMC | Sierra 3500 HD | Base |
| 2017-2019 | GMC | Sierra 3500 HD | Denali |
| 2017-2019 | GMC | Sierra 3500 HD | SLE |
| 2017-2019 | GMC | Sierra 3500 HD | SLT |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
