PRODUCT DETAILS
Honda K20A2/Z1/Z3 Intake Valve Spring – 14761-PRB-A02
This Honda K20 intake valve spring (OEM 14761-PRB-A02) is the correct single intake spring for K20A2, K20Z1, and K20Z3 heads. If you’ve got a 2002 RSX valve spring that’s gone soft or a tired 2006 Civic intake valve spring, this is the exact OEM piece you want. It keeps valve seating, lift, and timing where they should be on your K Series engine so you don’t chase misfires, compression loss, or random top-end noise.
This is the same Honda K20A2 intake valve spring used in the RSX Type S and the factory K20Z1/K20Z3 Honda valve spring used in the 2006–2011 Honda Civic Si. It’s sold individually, so you can handle an Acura valve spring replacement one cylinder at a time instead of buying an entire set when you only need a single intake valve spring. For a lot of builds and repairs, that’s the smart way to keep costs in check without cutting corners. For a full set you will need to purchase 8 springs.
The 14761-PRB-A02 valve spring is built to the original K20A2/K20Z1/K20Z3 spec, so installed height, pressure, and coil bind all land where Honda intended. Intake and exhaust springs aren’t the same on these motors, and mixing them up can wreck valve control at high RPM. If you’re refreshing a K20A2 engine valve spring on an RSX Honda valve spring setup or doing a Civic Si engine spring swap, stick with the correct K20A2 valve spring for sale here to keep reliability and performance intact.
Key Features
- OEM Honda single intake valve spring – 14761-PRB-A02
- Correct for K20A2, K20Z1, and K20Z3 K Series engine valve spring applications
- Sold individually for targeted Acura valve spring replacement or repair
- Maintains proper valve seating, lift, and timing at factory rev range
- Specific to the intake side – not interchangeable with exhaust valve springs
Compatibility
- 2002–2006 Acura RSX Type S
- 2006–2011 Honda Civic Si
Why Replace Individual Valve Springs?
On higher-mile K Series engines, it’s common for one Honda K20 intake valve spring to get weaker than the rest. You’ll see it as a random misfire, a slightly low cylinder on a leakdown, or a valvetrain that just doesn’t feel right at the top of the tach. Swapping a single K Series engine valve spring lets you fix the problem corner without throwing money at a full set.
If you’ve floated a valve, had a minor overrev, or are refreshing a used head, replacing one or a few K20A2/K20Z1/K20Z3 intake springs with fresh 14761-PRB-A02 units brings the top end back to stock behavior. You keep factory reliability, save cash, and know each RSX Type S or Civic Si engine spring you replace is the real OEM spec part your K needs.