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Small NACA Duct (1 Outlet), for 2.5" Hose

MS21042 Style B Jetnut, All Metal Locknut, SAE UNF Threads

Air Inlet, Extra-Small Rectangle, 6 x 3.5 inch, for 3" Hose

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High Temp Silicone 2-ply Air Duct Hose, 450F, Orange Only

Our 2-ply Silicone Rubber Air Duct Hose is popular for brake cooling ducts due to its high temperature capability (maximum 500° F continuous / 600° F intermittent). Lower-temperature applications can use our Neoprene 2-Ply Air Duct Hose (Part No. 3630).

This hose is flexible and pliable, but a bronze coated spring-steel wire support helix prevents it from collapsing. The fiberglass fabric cover and fiberglass cord are both impregnated and coated with silicone rubber. A second layer of silicone covers the inside of the hose to reduce turbulence. The 2-ply construction also withstands higher pressure and vacuum than our Single-Ply Silicone Air Duct Hose (Part No. 3621), so this hose is popular as engine intake plumbing on normally-aspirated applications. Red-orange color only. This silicone duct hose is not made in any other color.

Note: These ducts are manufactured in 12 foot nominal lengths but only measure 12 feet when stretched tightly. The actual lengths will generally measure several inches less than nominal.

Lined Silicone Air Duct Hose Pressure and Vacuum Limits
Inside Diameter	2 inch	2.5 Inch	3 Inch	4 Inch	5 Inch
Pressure	24 psi	20 psi	19 psi	16 psi	14 psi
Vacuum	20 in Hg	18 in Hg	16 in Hg	13 in Hg	10 in Hg
* For straight lengths of hose at 72° F. Temp range -76° F to +500° F.

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty	Part No.	Desc.	Price	Stock Status
1.50 inch Inside Diameter
	3631-1.50-3 FOOT Condition: New SKU: 81059	High Temp Silicone 2-ply Air Duct, 1.5 inch ID, 3 foot	$43.19	In Stock
	3631-1.50-6 FOOT Condition: New SKU: 81060	High Temp Silicone 2-ply Air Duct, 1.5 inch ID, 6 foot	$81.19	In Stock
	3631-1.50-12 FOOT Condition: New SKU: 81061	High Temp Silicone 2-ply Air Duct, 1.5 inch ID, 12 foot	$152.49	In Stock
2.00 inch Inside Diameter
	3631-2.00-3 FOOT Condition: New SKU: 52022	High Temp Silicone 2-ply Air Duct, 2 inch ID, 3 foot	$45.69	In Stock
	3631-2.00-6 FOOT Condition: New SKU: 52023	High Temp Silicone 2-ply Air Duct, 2 inch ID, 6 foot	$85.99	In Stock
	3631-2.00-12 FOOT Condition: New SKU: 52021	High Temp Silicone 2-ply Air Duct, 2 inch ID, 12 foot	$161.49	In Stock
2.50 inch Inside Diameter
	3631-2.50-3 FOOT Condition: New SKU: 52026	High Temp Silicone 2-ply Air Duct, 2.5 inch ID, 3 foot	$51.99	In Stock
	3631-2.50-6 FOOT Condition: New SKU: 52027	High Temp Silicone 2-ply Air Duct, 2.5 inch ID, 6 foot	$97.99	In Stock
	3631-2.50-12 FOOT Condition: New SKU: 52025	High Temp Silicone 2-ply Air Duct, 2.5 inch ID, 12 ft	$183.99	In Stock
3.00 inch Inside Diameter
	3631-3.00-3 FOOT Condition: New SKU: 52030	High Temp Silicone 2-ply Air Duct, 3 inch ID, 3 foot	$58.99	In Stock
	3631-3.00-6 FOOT Condition: New SKU: 52031	High Temp Silicone 2-ply Air Duct, 3 inch ID, 6 foot	$110.99	In Stock
	3631-3.00-12 FOOT Condition: New SKU: 52029	High Temp Silicone 2-ply Air Duct, 3 inch ID, 12 foot	$207.99	In Stock
4.00 inch Inside Diameter
	3631-4.00-3 FOOT Condition: New SKU: 52018	High Temp Silicone 2-ply Air Duct, 4 inch ID, 3 foot	$71.79	In Stock
	3631-4.00-6 FOOT Condition: New SKU: 52019	High Temp Silicone 2-ply Air Duct, 4 inch ID, 6 foot	$134.99	In Stock
	3631-4.00-12 FOOT Condition: New SKU: 52017	High Temp Silicone 2-ply Air Duct, 4 inch ID, 12 foot	$253.99	In Stock
5.00 inch Inside Diameter
	3631-5.00-3 FOOT Condition: New SKU: 52034	High Temp Silicone 2-ply Air Duct, 5 inch ID, 3 foot	$83.19	In Stock
	3631-5.00-6 FOOT Condition: New SKU: 52035	High Temp Silicone 2-ply Air Duct, 5 inch ID, 6 foot	$156.99	In Stock
	3631-5.00-12 FOOT Condition: New SKU: 52033	High Temp Silicone 2-ply Air Duct, 5 inch ID, 12 foot	$293.99	In Stock

Customers who purchased this item also purchased
Stainless Steel Worm-Drive Hose Clamp with Metal Lining	AN960 Flat Washer (100 pack)	Small NACA Duct (1 Outlet), for 2.5" Hose	MS21042 Style B Jetnut, All Metal Locknut, SAE UNF Threads	Air Inlet, Extra-Small Rectangle, 6 x 3.5 inch, for 3" Hose

High Temp Silicone 2-ply Air Duct Hose, 450F, Orange Only

Order Qty

Part No.

Desc.

Price

Stock Status

1.50 inch Inside Diameter

$43.19

$81.19

$152.49

2.00 inch Inside Diameter

$45.69

$85.99

$161.49

2.50 inch Inside Diameter

$51.99

$97.99

$183.99

3.00 inch Inside Diameter

$58.99

$110.99

$207.99

4.00 inch Inside Diameter

$71.79

$134.99

$253.99

5.00 inch Inside Diameter

$83.19

$156.99

$293.99

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Cooling Air Ducting Hose