Mack RD Trucks
Shop for aftermarket Mack RD truck parts (1979 – 2004) to repair, replace, and refurbish your heavy-duty vocational rig. We sell replacement and aftermarket parts for popular Mack RD models, including the RD600, RD688, RD688S, RD690, and RD690S. Source collision-replacement parts, customize the exterior, or add interior cab accessories to refurbish your truck at 4 State Trucks.
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- Qty in Cart
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- Price
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BESTfit 2.5 Inch 304 Stainless Steel V- Band Clamp
BESTFIT TRUCK PARTS
$30.992.5 Inch Stainless Steel V- Band Clamp By BESTfitEnsure leak-free, heavy-duty connections with the BESTfit 2.5 Inch 304 Stainless Steel V-Band Clamp. Its precision 2.5-inch diameter and robust 304...GR-VB-300C- SKU:
- GR-VB-300C
- Product Type:
- Exhaust
- Make:
- Universal Items
$30.99Qty in Cart: 0Price:$30.99Subtotal: -
BESTfit 7 Inch Zinc Plated Rain Cap
BESTFIT TRUCK PARTS
$173.037 Inch Rain Cap By BESTfitPrevent water and debris from entering your exhaust with the BESTfit 7 Inch Zinc Plated Rain Cap. Made for 7-inch straight stack openings, this zinc-plated steel cap offers...GR-RC-700- SKU:
- GR-RC-700
- Product Type:
- Exhaust
- Make:
- Universal Items
$173.03Qty in Cart: 0Price:$173.03Subtotal: -
BESTfit 7-5.5 Inch 90 Degree Rubber Reducer Elbow
BESTFIT TRUCK PARTS
$87.997-5.5 Inch 90 Degree Rubber Reducer Elbow By BESTfitKeep your air intake system performing at peak efficiency with the BESTfit 7-5.5 Inch 90 Degree Rubber Reducer Elbow, engineered for a smooth...GR-RRE-790-55- SKU:
- GR-RRE-790-55
- Degree Options:
- 90
- Product Type:
- Exhaust
- Material Options:
- Rubber
- Diameter Options:
- 7 Inch
- Make:
- Universal Items
$87.99Qty in Cart: 0Price:$87.99Subtotal: -
BESTfit 4 Inch Aluminized Steel Butt Joint Clamp
BESTFIT TRUCK PARTS
$15.854 Inch Aluminized Butt Joint Clamp By BESTfitReplace worn clamps with the BESTfit 4 Inch Aluminized Steel Butt Joint Clamp. Engineered from premium aluminized steel and designed for butt joint...GR-PF-4ABT- SKU:
- GR-PF-4ABT
- Product Type:
- Exhaust
- Make:
- Universal Items
$15.85Qty in Cart: 0Price:$15.85Subtotal: -
BESTfit 6-5 Inch ID Rubber Reducer Hose
BESTFIT TRUCK PARTS
$37.996-5 Inch ID Rubber Reducer Hose By BESTfitReplace worn or damaged intake connections with the BESTfit 6-5 Inch ID Rubber Reducer Hose, built for heavy-duty trucks. This high-quality 6-inch rubber...GR-RHH-6-5- SKU:
- GR-RHH-6-5
- Product Type:
- Exhaust
- Material Options:
- Rubber
- Diameter Options:
- 6 To 5 Inch
- Make:
- Universal Items
$37.99Qty in Cart: 0Price:$37.99Subtotal: -
BESTfit 7-6 Inch 90 Degree Rubber Reducer Elbow
BESTFIT TRUCK PARTS
$129.997-6 Inch 90 Degree Rubber Reducer Elbow By BESTfitAchieve secure, leak-free connections in your heavy-duty truck's intake system with the BESTfit 7-6 Inch 90 Degree Rubber Reducer Elbow. Designed to...GR-RRE-790-6- SKU:
- GR-RRE-790-6
- Degree Options:
- 90
- Product Type:
- Exhaust
- Style Options:
- Elbow
- Material Options:
- Rubber
- Diameter Options:
- 7 Inch
- Make:
- Universal Items
$129.99Qty in Cart: 0Price:$129.99Subtotal: -
BESTfit 5-6 Inch Exhaust Pipe Hook
BESTFIT TRUCK PARTS
$9.265-6 Inch Exhaust Pipe Hook By BESTfitSimplify exhaust pipe installation with the BESTfit 5-6 Inch Exhaust Pipe Hook, built to support 5- to 6-inch pipes. This high-quality hook provides stable...GR-PH-6A- SKU:
- GR-PH-6A
- Product Type:
- Exhaust
- Make:
- Universal Items
$9.26Qty in Cart: 0Price:$9.26Subtotal: -
BESTfit 48 Inch Aluminized Steel Heat Shield W/ Round Holes
BESTFIT TRUCK PARTS
$179.9948 Inch Aluminized 180 Degree Heat Shield W/ Round Holes By BESTfitSafeguard surrounding components from high exhaust temperatures with the BESTfit 48 Inch Aluminized Steel Heat Shield. The...GR-PG-G- SKU:
- GR-PG-G
- Material Options:
- Aluminum
- Length Options:
- 48 Inch
- Degree Options:
- 180
- Product Type:
- Exhaust
- Make:
- Universal Items
$179.99Qty in Cart: 0Price:$179.99Subtotal: -
BESTfit 3.5 Inch Guillotine Single Edge Saddle Clamp
BESTFIT TRUCK PARTS
$6.893.5 Inch Zinc Plated Guillotine Single Edge Saddle Clamp By BESTfitThe BESTfit 3.5 Inch Guillotine Single Edge Saddle Clamp ensures tight, reliable exhaust connections for commercial trucks. Its...GR-RB-35ZN- SKU:
- GR-RB-35ZN
- Product Type:
- Exhaust
- Make:
- Universal Items
$6.89Qty in Cart: 0Price:$6.89Subtotal: -
BESTfit 10 X 15 Inch Aluminized Steel Oval Muffler Hanger
BESTFIT TRUCK PARTS
$72.0910 X 15 Inch Oval Muffler Hanger By BESTfitSecure your truck's exhaust system with the BESTfit 10 x 15 Inch Oval Muffler Hanger. Crafted from durable aluminized steel and designed for horizontal...GR-OMH-1015- SKU:
- GR-OMH-1015
- Product Type:
- Exhaust
- Make:
- Universal Items
$72.09Qty in Cart: 0Price:$72.09Subtotal: -
BESTfit 4 ID X 4.21 OD X 8 Inch Hot Side CAC Hose
BESTFIT TRUCK PARTS
$90.994 ID X 4.21 OD X 8 Inch Hot Side CAC Hose By BESTfitDeliver dependable airflow in your EGR hot-side system with the BESTfit 4 ID x 4.21 OD x 8 Inch CAC Hose. This high-quality silicone hose provides...GR-HCAC-20074- SKU:
- GR-HCAC-20074
- Length Options:
- 6 Inch
- Material Options:
- Silicone
- Color:
- Red
- Diameter Options:
- 4 Inch
- Product Type:
- Engine Parts
- Make:
- Universal Items
$90.99Qty in Cart: 0Price:$90.99Subtotal: -
BESTfit 9.5 Inch ID X 10.25 Inch OD DPF Gasket For Cummins ISB 6.7L
BESTFIT TRUCK PARTS
$18.599.5 Inch ID X 10.25 Inch OD DPF Gasket By BESTfitMaintain a leak-free DPF system on your Cummins ISB 6.7L with the BESTfit 9.5 Inch ID x 10.25 Inch OD DPF Gasket. Crafted from high-quality materials,...GR-GRDPFG-1051-10- SKU:
- GR-GRDPFG-1051-10
- Product Type:
- Exhaust
- Style Options:
- Cummins
- Make:
- Universal Items
$18.59Qty in Cart: 0Price:$18.59Subtotal: -
BESTfit 4/4.5 ID X 6.5 Inch CAC Hose
BESTFIT TRUCK PARTS
$113.994/4.5 ID X 6.5 Inch Hot Side CAC Hose By BESTfitEnsure smooth airflow and long-term performance with the BESTfit 4/4.5 ID x 6.5 Inch CAC Hose, designed for EGR hot-side systems. Made of high-quality...GR-HCAC-12842- SKU:
- GR-HCAC-12842
- Color:
- Red
- Product Type:
- Engine Parts
- Diameter Options:
- 4 Inch
- Material Options:
- Silicone
- Length Options:
- 6 1/2 Inch
- Make:
- Universal Items
$113.99Qty in Cart: 0Price:$113.99Subtotal: -
BESTfit 10 X 44.5 Inch Aluminized Steel Muffler W/ 5 Inch Inlet/ Outlet
BESTFIT TRUCK PARTS
$204.9910 X 44.5 Inch Muffler W/ 5 Inch Inlet/ Outlet By BESTfitMaintain smooth and quiet exhaust operation with the BESTfit 10 x 44.5 Inch Type 1 Muffler. Constructed from aluminized steel, this round...GR-M-130- SKU:
- GR-M-130
- Product Type:
- Exhaust
- Make:
- Universal Items
$204.99Qty in Cart: 0Price:$204.99Subtotal: -
BESTfit 2 Inch X 25 Ft Galvanized Steel Flex Hose
BESTFIT TRUCK PARTS
$151.992 Inch X 25 Ft Galvanized Flex Hose By BESTfitKeep your system running smoothly with the BESTfit 2 Inch x 25 Ft Galvanized Steel Flex Hose. This high-quality galvanized metal hose measures 2 inches...GR-G15-2300- SKU:
- GR-G15-2300
- Style Options:
- Standard
- Finish Options:
- Galvanized
- Length Options:
- 300 Inch
- Diameter Options:
- 2 Inch
- Product Type:
- Exhaust
- Material Options:
- Steel
- Make:
- Universal Items
$151.99Qty in Cart: 0Price:$151.99Subtotal: -
BESTfit 6 Inch X 10 Ft Galvanized Steel Flex Hose
BESTFIT TRUCK PARTS
$169.996 Inch X 10 Ft Galvanized Flex Hose By BESTfitDepend on the BESTfit 6 Inch x 10 Ft Galvanized Steel Flex Hose for secure, corrosion-resistant connections in heavy-duty applications. Crafted from...GR-G15-6120- SKU:
- GR-G15-6120
- Finish Options:
- Galvanized
- Style Options:
- Standard
- Diameter Options:
- 6 Inch
- Length Options:
- 120 Inch
- Product Type:
- Exhaust
- Material Options:
- Steel
- Make:
- Universal Items
$169.99Qty in Cart: 0Price:$169.99Subtotal: -
BESTfit 3.5 ID X 3.71 OD X 6 Inch Hot Side CAC Hose
BESTFIT TRUCK PARTS
$62.993.5 ID X 3.71 OD X 6 Inch Hot Side CAC Hose By BESTfitProtect your engine and maintain smooth EGR operation with the BESTfit 3.5 ID x 3.71 OD x 6 Inch Hot Side CAC Hose. Constructed from durable...GR-HCAC-20071- SKU:
- GR-HCAC-20071
- Material Options:
- Silicone
- Color:
- Red
- Length Options:
- 6 Inch
- Product Type:
- Engine Parts
- Diameter Options:
- 3 1/2 Inch
- Make:
- Universal Items
$62.99Qty in Cart: 0Price:$62.99Subtotal: -
BESTfit 3/3.5 ID X 3.21/3.71 OD X 6 Inch CAC Hose
BESTFIT TRUCK PARTS
$61.993/3.5 ID X 3.21/3.71 OD X 6 Inch Cold CAC Hose By BESTfitThe BESTfit 3/3.5 ID x 3.21/3.71 OD x 6 Inch CAC Hose delivers dependable charge air flow for EGR cold side systems. Made from...GR-CCAC-20077- SKU:
- GR-CCAC-20077
- Material Options:
- Silicone
- Product Type:
- Engine Parts
- Length Options:
- 6 Inch
- Make:
- Universal Items
$61.99Qty in Cart: 0Price:$61.99Subtotal: -
BESTfit 4 X 12 Inch Galvanized Steel Flex Hose
BESTFIT TRUCK PARTS
$19.294 X 12 Inch Galvanized Flex Hose By BESTfitBuilt for durability and dependable operation, the BESTfit 4 x 12 Inch Galvanized Steel Flex Hose provides corrosion-resistant, flexible performance in a...GR-G15-412- SKU:
- GR-G15-412
- Material Options:
- Steel
- Diameter Options:
- 4 Inch
- Product Type:
- Exhaust
- Length Options:
- 12 Inch
- Finish Options:
- Galvanized
- Style Options:
- Flex
- Make:
- Universal Items
$19.29Qty in Cart: 0Price:$19.29Subtotal: -
BESTfit 4 ID X 6 Inch Aluminized Steel Coupler
BESTFIT TRUCK PARTS
$26.994 ID X 6 Inch Aluminized Coupler By BESTfitEnsure long-lasting and secure pipe connections with the BESTfit 4 ID x 6 Inch Aluminized Steel Coupler. Constructed from high-quality 16-gauge aluminized...GR-CP-46A- SKU:
- GR-CP-46A
- Product Type:
- Exhaust
- Make:
- Universal Items
$26.99Qty in Cart: 0Price:$26.99Subtotal:
