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Part:   5-400

AEM 5-400 Coupler

Accessories Coupler
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0
  • Connects 4 inch diameter tubes
  • 3 inches long
  • Constructed from durable reinforced silicone
  • Connects tubing to fit custom applications

AEM silicone hose couplers are designed to connect air intake tubes for racers, builders and fabricators to create custom ducting for turbocharger systems and air intakes. AEM couplers are constructed from reinforced, multi-ply silicone that can withstand very high working temperatures.
Specifications AEM 5-400 Product Specifications
Package Contents1 Coupler
Package Quantity1
Warranty90 Days
Product StyleAEM Coupler/Reducer
Weight0.3 lb (0.1 kg)
Product Box Height3 in (76 mm)
Product Box Length4 in (102 mm)
Product Box Width4 in (102 mm)
WARNING: Cancer and reproductive
Reviews Product Reviews

Ken Brown from Mount Pearl, Canada
August 12, 2017 - Part 5-400
Justin Karsten from Oreilly No.668
March 3, 2014 - Part 5-400
I just wanted to state that I called multiple people to find a 4 inch silicone coupler. No one could find one for me, but I did talk to a gentleman named Daniel on your tech support line. He found me a part quickly and gave me the part number so I could give my customer a price and availability.