Honda FK8 Civic Type R Air Bypass Valve Tube 36181-5BF-A00

Honda FK8 Civic Type R Air Bypass Valve Solenoid Tube - Genuine OEM (36181-5BF-A00)

Sorting out the air bypass system on your Type R? Whether you've got a cracked tube to replace or you're building the FK8 setup onto your FK2, this is one of the pieces you'll need. Honda 36181-5BF-A00 is the genuine air bypass valve solenoid tube off the FK8 Civic Type R, the line that ties the solenoid into your turbo's bypass valve. It's a small thing, but it's part of what keeps your turbo from beating itself up every time you lift off the gas, so if yours is split or you're missing one for a swap, you want the real Honda piece going back in, not something you cobbled together.

Here's What It's Actually Part Of

Quick rundown so you know what you're working with. When you're hard on boost and snap off the throttle, all that compressed air suddenly has nowhere to go. If it slams up against a closed throttle, you get compressor surge, that flutter that sounds cool but is actually pounding on your turbo. Your air bypass valve stops that from happening by routing the air back around so the turbo just keeps spinning happy, and a solenoid is what flips that valve open. This tube is part of that solenoid's plumbing. It's not the flashiest part on the car, but when it's cracked or leaking, the system can't seal up and do its job, so it's worth putting a proper Honda one back in instead of trying to patch it.

FK2 Owners, This Is Your Upgrade Path

Here's the part you'll care about if you're on an FK2. The bypass setup the FK8 came with bolts onto the earlier FK2 Type R, and this tube is one of the genuine Honda pieces that makes that swap work. So if you're putting the FK8-style bypass system on your FK2, don't go hunting for something that looks close, this is the exact factory tube for it. It's the same part Honda ran on the FK8, so it fits the FK8 system dead-on and carries right over to the FK2 build.

It's Genuine Honda, So You're Not Fighting It

This is the real Honda tube, shaped and sized exactly for this system, so it routes and seals the way it should with no trimming and no making it work. You're plumbing a pressurized system here, so the last thing you want is a generic piece that sits a little off and weeps boost on you. Get the OEM one and you know it's right the first time.

What You Get

• Genuine Honda air bypass valve solenoid tube (36181-5BF-A00)
• Part of the FK8 Civic Type R air bypass system
• Bolts onto the FK2 as part of the FK8 bypass upgrade
• Direct OEM fit, no modification needed
• Sold individually

Fits These Cars

• 2017-2021 Honda Civic Type R (FK8)
• 2015-2017 Honda Civic Type R (FK2), as part of the FK8 bypass system upgrade

Note: Genuine Honda air bypass valve solenoid tube, part number 36181-5BF-A00, part of the air bypass system on the FK8 Civic Type R. The air bypass system routes charge air to prevent compressor surge when the throttle closes, and this tube is part of the solenoid plumbing that controls the bypass valve. The FK8 air bypass setup can be used to upgrade the earlier FK2 Civic Type R, and this is one of the genuine Honda parts for that retrofit. Direct OEM fit with no modification required. Sold individually. Fits the 2017-2021 Honda Civic Type R (FK8) and the 2015-2017 Honda Civic Type R (FK2) as part of the FK8 bypass upgrade. One tube per order.