Search result for: 18231SNAA00
BOLT B,FLEX.JOINT
Part number: 18231SNAA00
Availability: 0
Weight, kg: 0.058
Make: Honda
Made in: Japan

Exhaust Flex Joint Bolt for Honda Applications
This OEM-grade fastener locks the flex section of your exhaust to the mating flange, keeping the gasket sealed and the system aligned under heat, vibration, and engine movement. It is essential for a quiet, safe, and efficient ride. Without a solid clamp at the flex joint, gases escape, fuel trims drift, and components wear out faster.
Why you need it
The flex joint allows the exhaust to move with the engine. This bolt maintains constant clamping force so the joint can flex without losing seal. It prevents leaks, rattles, and stress cracks in pipes and the catalytic converter.
How it works
Built from heat-treated, high-tensile steel with corrosion protection, the bolt works with the spring and nut (where fitted) to keep even pressure on the flange and crush the gasket correctly. It tolerates thermal expansion while stopping loosening.
When it fails β οΈ
Expect loud exhaust noise, fumes near the cabin, burned gaskets, poor fuel economy, CEL from disturbed O2 readings, and possible damage to the flex pipe or cat due to misalignment. Seized or stretched threads also prevent proper torque.
Pro tips οΈ
- Replace bolts in pairs and inspect springs, nuts, and gasket.
- Clean flanges; use high-temp anti-seize on threads (not on gasket).
- Tighten evenly to factory torque; recheck after a heat cycle.
Compatibility
- Civic
- Accord
- Fr-V
- Civic Hybrid
- Cr-V I-Ctdi
- Cr-V I-Dtec
- Cr-Z
- Jazz
- Jazz Hybrid
- Accord Tourer
- City
- Insight
- Cr-V
- Civic/Hybrid
- Fit
- Civic Gx
- Element
- Acty Van
- Vamos Hobio
- Life
- Freed Spike
- Airwave
- Partner
- Odyssey
- Stream
- Civic 4D
- Freed Hybrid
- Freed Spike Hyb
- Zest Sports
- Zest Spark
- Crossroad
- Freed
- Step Wgn
- Step Wgn Spada
- Fit Hybrid
- Fit Shuttle
- Fit Shuttle Hyb
- Accord 4D
- Insight Exclusi
- Acty Truck
- Brio Amaze
- Mobilio
- Brio
- Amaze
- Honda Mobilio
- Accord Euro Tou
- Br-V
