Banks Power 04-05 Chevy 6.6L LLY Ram-Air Intake System - Dry Filter
The Banks 42135-D is the dry filter version of the Ram-Air intake built for 2004-2005 Chevrolet Silverado and GMC Sierra 2500HD and 3500 pickups with the 6.6L Duramax LLY. Owners usually shop for it when the factory airbox is choking the turbo on long pulls, exhaust gas temperature climbs faster than they like while towing, or they are tired of buying disposable paper elements and do not want the mess of an oiled filter near the MAF sensor.
The LLY breathes through a stock box and a small paper filter, then a tube feeding the turbo compressor. The Banks kit replaces that path with an enclosed housing that holds a much larger reusable element, a new LLY-specific intake tube, a compressor inlet hose and a 4.50 inch inside diameter bellows that lets the engine rock on its mounts without stressing the tube. The enclosed box keeps the filter breathing outside air instead of hot underhood air, and Banks says the system outflows stock by up to 35 percent, with gains of up to 39 hp and 69 lb-ft when paired with a tuner. More dense air for the same fuel means lower EGTs and less smoke under load.
The dry element (Banks part 42138-D) traps dirt in the media without any oil film, so there is nothing to wick onto the mass airflow sensor after a cleaning.
An intake will not cure a transmission problem. If the truck flares between gears, shudders at cruise or drops into limp mode, start with our Allison 1000 limp mode causes guide before spending money on power parts, because more power on a slipping Allison makes it worse.
Check under the hood that you have the LLY. The Banks manual for this kit is shared with the earlier LB7 version, and the parts list shows a separate intake tube for each engine, so the LLY and LB7 tubes are not interchangeable. Look at the stock compressor inlet hose and clamps for cracks or oil residue, since a leak after the filter lets dirt straight into the turbo. Read any stored codes and note them before the install so you can compare afterward.
This kit is listed for 2004-2005 Chevrolet and GMC 2500HD and 3500 pickups with the 6.6L Duramax LLY diesel. CARB executive order D-161-102 lists 42135-D for 2004-2005 GM pickups with the Duramax LLY. That order is now marked rescinded on the CARB site, so if your truck is registered in California, ask us about current status before ordering. Early 2004 trucks may still have the LB7, which needs the 42132-D kit instead. If you are unsure which engine you have, send us the year and VIN. Prefer an oiled element? The same hardware comes in the 42135 oiled filter kit. Transmission parts for these trucks are in our Allison 1000 collection.
Banks suggests cleaning the dry element every 50,000-100,000 street miles, sooner in dust, or when a restriction gauge reads 18 inches of water. A power upgrade is a good moment to service the transmission too; the Allison deep pan and filter kit adds fluid capacity, and our Allison 1000 fluid and filter specs cover the fill.
| Brand | Banks Power |
| Part number | 42135-D |
| Fits | Banks Power 04-05 Chevy 6.6L LLY Ram-Air Intake System - Dry Filter |
| Type | Short Ram Air Intakes |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. The LB7 uses a different intake tube and is covered by the 42132-D kit. The 42135-D is for the LLY engine in 2004-2005 trucks. Send us your VIN if you are not sure which engine you have.
Tap out loose dirt, spray a dry air filter cleaner on both sides, soak 10 minutes, rinse from the clean side out with cool or warm water and let it air dry. Never use gasoline, solvents or high-pressure water, and do not oil a dry element.
No. The kit reuses the factory MAF sensor and filter minder and is designed not to set codes on a stock truck. Banks quotes its largest power gains with a tuner.
The intake alone adds modest power. If you add a tuner as well, make sure the transmission is healthy and serviced first, since extra torque on a worn Allison speeds up clutch slip.
It is a bolt-in job with hand tools and no cutting. Read the full Banks manual first; most of the time goes into moving the MAF sensor and filter minder and aligning the tube.
