Overview This precision 1/4" open tip thermocouple delivers accurate exhaust gas temperature monitoring for serious engine builds. At 1.07m (42") length, it's perfectly sized for most applications from single turbo setups to naturally aspirated builds where EGT data is critical for safe tuning and performance optimisation. Technical Specifications Part Number: HT-010864 Probe Diameter: 1/4" (6.35mm) Cable Length: 1.07m (42") Tip Design: Open (exposed junction) Response Time: Fast response for real-time EGT monitoring Why You Need This Exhaust gas temperature is one of the most critical parameters for engine safety and performance tuning. Without accurate EGT monitoring, you're flying blind — especially on forced induction builds where pre-turbine temperatures can quickly climb into the danger zone above 950°C. This open tip design provides faster response times than sheathed alternatives, giving you real-time data when making critical tuning decisions on boost, timing, and fuel delivery. The 1/4" diameter strikes the perfect balance between durability and response speed. We see this size regularly specified on everything from RB25/26 single turbo conversions to LS swap applications and 2JZ builds. The 42" cable length works well for most engine bay layouts without requiring extensions, whether you're monitoring pre-turbo on a rear-mount setup or post-turbo temperatures on a traditional front-mount configuration. Popular mounting locations include exhaust manifold bungs (3-6 inches from the head) or in the downpipe before the wastegate merge. ECU & System Compatibility Compatible with all Haltech Elite and Nexus ECU families that support thermocouple inputs, including Elite 550/750/1000/1500/2000/2500 and Nexus R3/R5 systems. Also works with standalone EGT monitoring systems and aftermarket gauges that accept K-type thermocouple inputs. Contact our team to confirm specific wiring requirements for your ECU and desired mounting location. What's in the Box 1x Haltech 1/4" open tip thermocouple probe 1.07m (42") of high-temperature cable with standard thermocouple connector Complete Your Build Most customers adding EGT monitoring also require welding bungs for exhaust manifold or downpipe mounting, plus appropriate extension cables if running to dashboard-mounted displays. Our technical team can recommend complete EGT monitoring solutions including compatible Haltech ECU inputs, aftermarket gauge options, and professional installation of exhaust bungs. With UK stock and fast despatch, we'll have your EGT monitoring sorted quickly — contact us for application-specific advice and companion parts recommendations.
