aFe Momentum HD Stage-2 Si Pro DRY S Cold Air Intake System - Chevrolet Silverado / GMC Sierra 2500 HD / 3500 6.6L 2001-2004

Which engine does it fit?

• The 6.6L Duramax LB7 in the 2001-2004 Chevrolet Silverado and GMC Sierra 2500 HD / 3500.

Is it emissions legal?

• It is covered by CARB Executive Order D-550-18 for the 2004 models. The EO sticker in the kit goes on or near the intake and is needed for smog inspection.

What is the replacement filter?

• Part number 21-91059, a Pro DRY S filter that can be cleaned and reused.

Do I need to oil the filter?

• No. Pro DRY S media is oil-free.

Is there a Pro 10R version?

• Yes, as part 50-74001.

Shipping

• Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Special order items follow a lead time we confirm with you individually before the order is committed.
• Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
• Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
• 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 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
• Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
• Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
• Product images may be representative. The SKU and specifications in the listing are what ships.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty