CAC Hose, 4.00" I.D. x 7.00" long - Black

Big-diameter boost hoses balloon under pressure, and on a 4 in charge pipe that growth can push a coupler off its bead or let it rub on nearby parts. Vibrant's CAC hoses address the problem with stainless steel rings built into the silicone, which limit how far the hose can expand as boost climbs. Part 11829 is a 4.00 in I.D. by 7.00 in long CAC hose in black, with aramid reinforcement fabric between each silicone layer and three stainless rings along its length.

Typical applications

Four inch charge air plumbing is most common on diesel pickups, large single-turbo gas builds and heavy-duty intercooler kits, often where a factory boot has split or a joint keeps blowing apart. Vibrant rates this line for hot side and cold side charge air from -75°F to 392°F, for air, water and coolant service only. The 7 in length leaves room for a short gap between tube ends, which lets the hose soak up engine movement and minor misalignment between the cooler and the intake.

Installation notes

Leave a gap of an inch or so between the pipe ends inside the hose so it can flex, and seat a 4 in T-bolt clamp on each end behind the tube bead. Wipe oil film off the tubes with a degreaser before assembly, since a slick surface lets even a ringed hose creep under boost. Retorque the clamps after the first heat cycle, because silicone settles slightly once it has been hot.

Frequently Asked Questions

Is 11829 a hump hose or a straight coupler?

Vibrant lists 11829 in its CAC hose line, and its CAC couplers come in 4.00 in I.D. with 6, 7 and 8 in lengths. Some resellers describe this number as a hump hose with three stainless rings, so check the product photos if the hose profile matters for your clearance.

What does CAC stand for?

CAC means charge air cooler, the intercooler on a turbocharged or supercharged engine. CAC hoses connect the turbo, the cooler and the intake, and they see both heat and repeated pressure cycles.

Is there a longer version?

Yes. Vibrant 11830 is the same 4.00 in I.D. black CAC hose in an 8.00 in length. Pick the length that leaves a small gap between tube ends with full clamp engagement on both sides.

Fitment: Universal. Confirm the sizes and thread types listed above against your application before ordering.