Introduction
Pop the hood on a well-built Z32 300ZX and you'll know immediately whether the owner takes their engine bay seriously. The factory valve covers do the job, but they're a far cry from what a performance-built VG30DE/TT deserves. Polar Engineering's Billet Baffled and Vented Valve Covers are the upgrade that checks every box: performance engineering, premium materials, and engine bay aesthetics that match the rest of your build.
Why Upgrade Your Valve Covers?
The stock Z32 valve covers weren't designed with high-performance use in mind. Under hard driving, track days, or aggressive spirited pulls, oil can find its way into the PCV system and cause issues — not ideal when you've invested heavily in your engine. Aftermarket baffled and vented covers address this directly, venting crank case, separating oil from blow-by gases before they re-enter the intake system, keeping your engine cleaner and running correctly.
Beyond performance, factory covers show their age. When everything else under the hood is upgraded, OEM covers stand out for all the wrong reasons.
What Makes These Covers Different
- CAD-designed internal baffles located under the vent ports — oil stays where it belongs, blow-by gases exit clean
- Available in aluminum or magnesium — aluminum offers excellent strength and value; magnesium takes it further with significant weight savings for those chasing every gram (made to order, 5-week lead time)
- Custom Viton gaskets on all four covers — premium sealing material that handles heat and oil better than standard rubber, included and pre-installed
- Full set of four covers — complete coverage for the entire VG30DE/TT engine in one kit
- Hardware is included — Zinc silver bolts are tough and corrosion resistant
Make It Yours
No two builds are alike, and these covers reflect that:
- Anodized silver (as machined) or anodized black — clean, classic, and in stock now
- Custom anodized colors available for $150 extra — match your engine bay, your livery, or your personal style
- Extra gasket set available as an add-on ($40) — smart to have a spare on hand
Pricing
- Aluminum version — $950 USD
- Aluminum custom color — $1,100 USD
- Magnesium version — $1,250 USD
- Magnesium custom color — $1,400 USD
Aluminum sets are in immediate stock in silver and black. Custom colors ship within one week. Magnesium is made to order — contact us to confirm availability.
The Bottom Line
Whether you're building a show car, a track weapon, or the cleanest street Z32 in your city, these valve covers deliver where it counts — proper baffling, premium sealing, and an engine bay presence that speaks for itself. If you've been eyeing these, now is the time to act.
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