I replaced the top timing chain guide on my G37 using an OEM unit from Z1 Motorsports during a full timing service, and I’m very satisfied with the quality and fitment.
The guide is well-built and meets OEM standards. Fitment was perfect, and installation was straightforward with no issues. It aligned properly with the chain and mounting points, which is critical for maintaining proper timing operation and reducing unnecessary wear.
Even though it’s not a large or complex component, the top timing chain guide plays an important role in keeping the chain stable and properly routed. It’s definitely worth replacing while you’re already in the engine, rather than risking wear or failure from an older part.
Z1 Motorsports delivered as expected—fast shipping, secure packaging, and everything arrived in excellent condition.
Overall, I’m very satisfied with the part and the purchasing experience. If you’re doing timing work on your VQ, this is a simple but important component to replace, and Z1 is a reliable source for OEM parts.