Grassroots Oil Cooler for Nissan 370Z, 350Z & Infiniti G37, G35 - Boost Performance
Protect your VQ from the #1 killer of track days and spirited driving with this Grassroots Performance Oil Cooler Kit engineered for Nissan 350Z, 370Z and Infiniti G35, G37 platforms running VQ35DE, VQ35HR, and VQ37VHR engines that routinely see oil temps climb past 260-300°F where factory water-to-oil exchangers heat-soak and oil viscosity breaks down leading to bearing wear, timing chain guide failure, and rod knock, solved by this motorsport-grade kit featuring a 19-row bar & plate oil cooler core measuring 13" x 5.75" x 2" that’s stronger than tube-and-fin designs and drops temps 30-50°F on track, paired with a thermostat-controlled M20x1.5 sandwich plate that opens at 180°F to route 100% of flow through the cooler while allowing fast warm-up for street driving and preventing over-cooling in colder weather, including dual 1/8" NPT ports for oil temp and pressure sensors without extra adapters, plus pre-cut -10AN stainless steel braided PTFE lines with black nylon outer braid rated for 300°F+ continuous operation and CNC-machined black anodized swivel fittings for leak-free routing, all mounting to factory points behind the driver-side bumper duct on 350Z/G35 or center crash bar on 370Z/G37 with included laser-cut brackets and hardware requiring no drilling for a true 3-5 hour bolt-on install, delivering consistent power by preventing ECU timing pull from excessive oil temps, enabling full 20-minute HPDE sessions without limp mode, and keeping bearings, cams, and timing components within safe operating range on turbo builds, drift cars, and canyon cars in hot climates, using the same proven core design and thermostatic control found in motorsport applications, compatible with 2003-2008 350Z, 2009-2020 370Z, 2003-2007 G35, 2008-2013 G37 Coupe/Sedan/Convertible, and 2014-2015 Q60 3.7L models, giving you factory reliability with track-level thermal control so your VQ stays protected whether you’re chasing lap times or daily driving.
Key Features:
- 19-Row Bar & Plate Core : Large 13" x 5.75" x 2" louvered core maximizes heat rejection for 30-50°F oil temp drops on track. Bar-and-plate construction resists rock strikes and pressure spikes better than tube-and-fin designs.
- Thermostatic Sandwich Plate : M20x1.5 adapter with built-in 180°F thermostat ensures fast warm-up for street driving, then routes 100% of flow through the cooler once at operating temp to prevent over-cooling.
- Direct VQ Fitment : Bolt-on for 2003-2008 350Z, 2009-2020 370Z, 2003-2007 G35, 2008-2013 G37, and 2014-2015 Q60 3.7L with VQ35DE, VQ35HR, or VQ37VHR engines.
- 10AN PTFE Lines : Stainless steel braided lines with PTFE inner liner handle 300°F+ continuous temps and won’t degrade or sweat like rubber. Pre-cut for perfect Z/G chassis routing with no kinks.
- Dual Sensor Ports : Sandwich plate includes 2x 1/8" NPT ports for oil temp and oil pressure gauges. Monitor data without stacking adapters or relocating your oil filter.
- CNC-Machined Fittings : Black anodized 45° and 90° swivel -10AN fittings allow clean, leak-free routing. Swivel design prevents line twist during install and service.
- No-Drill Mounting : Laser-cut steel brackets use factory mounting points behind the driver-side bumper duct on 350Z/G35 or center crash bar on 370Z/G37. Includes rubber isolators for rattle-free operation.
- Track-Proven Thermal Control : Stabilizes oil temps at 220-240°F during 20-minute HPDE sessions instead of 280-300°F. Prevents ECU timing pull and loss of power lap after lap.
- Street Friendly Operation : Thermostat keeps oil at 180-200°F during normal highway driving, matching factory warm-up behavior so you’re not running cold oil on short trips.
- Complete Hardware Kit : Includes cooler, sandwich plate, lines, fittings, mounting brackets, and all nuts, bolts, and zip ties for a true bolt-on install in 3-5 hours with basic hand tools.