Honda K20Z3/K24A/K24Z Top Timing Chain Guide 14540-RRA-A02

Genuine Honda Top Timing Chain Guide (14540-RAA-A02) - K20Z3, K24A & K24Z

The top timing chain guide is a small part with a big job: it keeps your timing chain riding where it's supposed to at the top of its travel, quiet and controlled, instead of slapping around and wearing itself out. Over miles and heat cycles these plastic guides get brittle, wear down, and eventually crack, and a failing guide means chain noise, slack, and in a worst case a chain that jumps and takes your engine with it. This is the genuine Honda RAA guide (14540-RAA-A02), the correct replacement for a whole range of K-series engines, and it's the one a lot of builders specifically want for a reason we'll get into below.

Why Builders Choose The RAA Guide

Here's the detail that makes this the sought-after part number. The RAA guide is the wider design, and that extra width is exactly what you want on a higher-revving engine. More surface area against the chain means better control and support when the engine is spinning hard and the chain is under more load and more whip. So while this is the correct factory replacement for a tired or cracked guide on any of these engines, it's the one K-series builders reach for on cammed, high-rpm, and built motors where chain control matters most. If you're refreshing the timing components on a spirited or built K, this is the guide you want up top.

Do It While You're In There

Timing chain guides live behind the chain cover, so getting to one means real teardown. That's exactly why you don't want to do this job twice. If you've already got the front cover off for a chain, tensioner, water pump, or any timing service, replace the guides while you have access, they're cheap, they're a known wear item, and coming back for a worn guide later means tearing all of it apart again. Fresh chain, fresh tensioner, fresh guides: do the set together and button it up once.

Why Genuine Honda Matters On A Timing Part

This is not a spot to gamble on cheap hardware. A timing guide has to be the right shape and the right material to survive constant chain contact, oil, and heat for years. This is the exact Honda-spec RAA guide, so it fits correctly, sits where it should, and holds up the way a timing component has to. When a failure here can cost you an engine, the genuine part is cheap insurance and the only smart choice.

Fits Your K-Series Engine

This top guide (14540-RAA-A02) fits the K20Z3, K24A2, K24A4, K24A8, K24Z1, K24Z2, K24Z3, and K24Z7 across a wide range of Honda and Acura cars:

It also covers other applications running these engines, including swaps. Confirm the part against your engine before ordering.

Who Should Grab This Guide

This is for anyone doing timing chain service on a K-series, chasing chain noise, or building a higher-revving motor that deserves the wider RAA guide up top. Whether you're fixing a worn, rattling guide or setting up a fresh build to run right for the long haul, this is the correct genuine Honda piece for the job. Grab it, install it while you're in there, and keep your timing chain quiet and controlled.

Fits: Honda K20Z3, K24A2, K24A4, K24A8, K24Z1, K24Z2, K24Z3, and K24Z7, across the models in the table above, plus swaps. Part number: 14540-RAA-A02. Type: genuine Honda top timing chain guide (wider RAA design). Best for: factory replacement and higher-revving or built engines. Sold: individually.