aFe 50-74003 is the Momentum HD intake with one oiled Pro 10R 20-91059 filter for specified GM 2006–2007 LLY/LBZ 6.6L turbo-diesel applications. The current exact manufacturer product page identifies this oiled configuration; its explicitly shared illustrated manual supplies the hardware and procedure below.
Current exact primary and shared manual coverage is 2006–2007 GM LLY/LBZ 6.6L diesel. Original application groups, year bounds and gaps remain unchanged. Match actual engine generation, sensor arrangement, inlet connections and original mounting; optional gas engines in the same trims are not approved. Missing named-trim rows remain follow-up holds until exact selected-part proof resolves them. The manual cover says LBZ, while the current selected-part page says LLY/LBZ. Original 2007 groups specifically name Classic, not 2007.5 LMM. The broader LLY wording remains conditional on actual matching hardware rather than a blanket related-engine approval.
| Years | Make | Model | Named trim; actual engine and hood requirements apply |
|---|---|---|---|
| 2006 | Chevrolet | Silverado 2500 HD | LS |
| 2006 | Chevrolet | Silverado 2500 HD | LT |
| 2006 | Chevrolet | Silverado 2500 HD | WT |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LS |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LT |
| 2007 | Chevrolet | Silverado 2500 HD Classic | WT |
| 2006 | Chevrolet | Silverado 3500 | LT |
| 2006 | Chevrolet | Silverado 3500 | WT |
| 2007 | Chevrolet | Silverado 3500 Classic | LS |
| 2007 | Chevrolet | Silverado 3500 Classic | LT |
| 2007 | Chevrolet | Silverado 3500 Classic | WT |
| 2006 | GMC | Sierra 2500 HD | SL |
| 2006 | GMC | Sierra 2500 HD | SLE |
| 2006 | GMC | Sierra 2500 HD | WT |
| 2007 | GMC | Sierra 2500 HD Classic | SL |
| 2007 | GMC | Sierra 2500 HD Classic | SLE |
| 2007 | GMC | Sierra 2500 HD Classic | SLT |
| 2007 | GMC | Sierra 2500 HD Classic | WT |
| 2006 | GMC | Sierra 3500 | SL |
| 2006 | GMC | Sierra 3500 | SLE |
| 2006 | GMC | Sierra 3500 | SLT |
| 2007 | GMC | Sierra 3500 Classic | SL |
| 2007 | GMC | Sierra 3500 Classic | SLE |
| 2007 | GMC | Sierra 3500 Classic | SLT |
| 2007 | GMC | Sierra 3500 Classic | WT |
Verify 50-74003 against the actual engine, sensor and vent connections, mounting locations and applicable emissions requirements before ordering.
| Brand | aFe POWER |
| Manufacturer Part Number | 50-74003 |
| Product type | Momentum HD cold air intake |
| Selected filter | One 20-91059; ten-layer oiled cotton-media Pro 10R |
| Tube / housing | 05-74003B1 / 05-74003B2-S |
| Coupling | 05-01430 silicone bellows/double-hump |
| T-bolt clamps | One large 03-50267 and two 03-50319 (4-7/16 inches) |
| Sensor screws | Two M4 03-50034; length omitted in this exact manual |
| Seal / auxiliary plug | 26-inch 05-00072 / 05-01202 |
| Torque / recheck | No numeric torque; retighten connections after approximately 100–200 miles |
| UPC | 802959540121 |
| WARNING | This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov. |
| Quantity | Manufacturer service part | Component |
|---|---|---|
| 1 | 20-91059 | Selected Pro 10R filter; other media rows are alternatives |
| 1 | 05-74003B1 | Intake tube |
| 1 | 05-74003B2-S | Windowed housing |
| 1 | 05-00072 | 26-inch seal trim |
| 1 | 05-01202 | Auxiliary-inlet urethane plug |
| 1 | 03-50267 | Large T-bolt, 8-5/16-inch nominal |
| 2 | 03-50319 | T-bolt clamps, 4-7/16 inches |
| 1 | 05-01430 | Silicone coupling |
| 2 | 03-50034 | Two M4 03-50034; length omitted in this exact manual |
| 1 | 03-50066 | T20 Torx bit |
This listing includes one Pro 10R 20-91059 filter; alternate dry, Pro 5R or Pro GUARD7 rows in the shared manual are not additional included filters. The current selected-part and service-filter pages identify ten-layer oiled media, while the historical guide labels this oiled service number Pro 5R; that legacy label is not substituted for the current selected-media identity. Current kit text reports 99.59-percent cumulative efficiency, but the exact current service-filter text reports 99.47 percent. Test protocol and boxed revision remain unresolved, so neither figure is certified as one guaranteed efficiency. The service-filter headline rounds base/top to 8 inches while detailed text says 8-1/8 inches; flange is 6 inches and height 9 inches. The 1,000-CFM filter-family statement is separate from whole-system bench flow. Maintenance supplies and alternative filters are separate. The exact BOM names 05-01430 as bellows while the procedure calls it hump; both refer to that same listed part. It repeats its BOM and has inconsistent clamp-letter and auxiliary-plug callouts; use the actual component table and illustrations rather than inventing extra clamps. No replacement mounting plate, resonator plug or breather hose is listed. Its two M4 screws have no numeric length in this exact manual.
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
One 20-91059 Pro 10R oiled filter. Other media rows in the shared manual are alternatives, not additional filters.
What media does this exact filter use?The current exact service-filter primary specifies three oil-free synthetic layers. Oiled-sibling media and flow claims are not substituted.
Which oiled-media identification applies?The current exact kit and service-filter pages say ten-layer Pro 10R. The older guide’s Pro 5R label for the same oiled service number remains a source conflict.
Must a new mounting plate be installed?This exact BOM does not list one. Do not borrow the earlier LLY/LB7 mounting-plate procedure.
Which end is connected first?The exact procedure connects the turbo-inlet coupling end first, then rotates the tube down into the filter.
Do marked-point gains equal independent peak gains?No. The linked graph’s low-rpm marked differences are much larger than its independent peak differences; run conditions and supporting modifications also matter.
Is one efficiency figure fully established?No. Current kit text says 99.59 percent while the exact service-filter page says 99.47 percent. Test and revision details remain qualified.
What torque and recheck interval apply?No numeric torque is stated. Retighten connections after approximately 100–200 miles using the selected exact manual.
Verify aFe 50-74003. On a cool engine, disconnect both batteries as the exact first step directs, then disconnect MAF and remove the stock tube and airbox after loosening the clamps. Clean release agent from the filter flange before seating it loosely in the housing. Follow the manual’s initial T-bolt fit-and-tighten recommendation without inventing a numeric torque. Install the 26-inch seal, transfer the original bottom retaining plug and firmly seat the housing in the factory grommets. Transfer MAF using the two supplied M4 screws and transfer the filter minder with its original grommet. Fit the supplied bellows/hump coupling and two smaller T-bolt clamps loosely. Connect the turbo-inlet coupling end first, rotate the tube downward and insert it into the filter. Align and tighten all clamps, reconnect MAF and both batteries, and use the optional auxiliary-inlet plug if desired. Retighten connections after approximately 100–200 miles. No screw length or numeric torque is specified in this exact manual.
The current selected-part page advertises 57-percent flow and up to 21 hp/56 lb-ft; its labeled bench chart shows 312 versus 199 CFM at 1.5 inches H2O, about 56.8 percent. The linked family dyno uses blue for the intake and red for stock: marked power 209.12 versus 187.95 differs by 21.17 hp, and torque 548.99 versus 493.42 differs by 55.57 lb-ft. Independent peaks differ by only 6.91 hp (332.19 versus 325.28) and 2.88 lb-ft (600.53 versus 597.65). Both runs list an 8-inch lift, cat-back exhaust, aFe turbo-inlet tube, fourth gear and 30-percent brake. Intake April 5, 2013 conditions are 73.73°F/29.11 in-Hg/44% humidity/SAE 1.02, versus stock April 4 conditions 70.55°F/29.12/51%/SAE 1.01. Those additional modifications, differing conditions and point-versus-peak results remain explicit; gains are not guaranteed for all vehicles. The current exact page cites D-550-18 for some or all applications. Official indexed Exhibit A text names this exact part with the corresponding GM HD 6.6L engine-year family, but direct official access presents a robot-verification challenge and was stopped. Verify actual engine, applicable year, required identification and current legal scope; a replacement filter’s no-EO-required status does not certify the complete intake for every application.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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