Ecotec Thermostat Restrictor (Gutted Thermostat Mod) – Precision Cooling Flow Control Upgrade

Optimize your Ecotec cooling system with the BK Racing Thermostat Restrictor (Gutted Thermostat) — the best thermostat restrictor mod for GM Ecotec engines, providing controlled coolant flow for consistent temperatures in high-performance, track, or racing applications. This modified thermostat (guts removed for permanent open state with restricted bypass) acts as a flow restrictor plate, preventing overly rapid coolant circulation that can cause inefficient heat transfer or overcooling issues.

Precision-prepared from a genuine thermostat base, this restrictor maintains essential flow restriction to allow proper radiator dwell time while eliminating thermostat failure risks — ideal for Cobalt SS, Ion Redline, HHR SS, Solstice GXP, and Saab 9-3 owners pushing boost or aggressive tunes.

Key Features:

• Gutted design with calibrated restriction for balanced coolant velocity
• Direct bolt-in replacement — uses factory thermostat housing and gasket
• Eliminates sticking or failing thermostat mechanisms
• Durable construction ready for extreme heat cycles

Performance Benefits:

• Consistent operating temperatures for optimal engine efficiency and power
• Prevents overcooling in cold weather or light load while improving heat dissipation under load
• Reduces risk of detonation in boosted setups by maintaining proper coolant speed
• Popular mod for track/race Ecotecs — pairs perfectly with BK Racing timing kits, mounts, and valvetrain upgrades

Compatibility:

• GM Ecotec engines (all variants where standard thermostat fits):
  • 2.0L (LSJ supercharged, LNF/LDK/LHU turbo)
  • 2.2L (L61, LAP, LE8)
  • 2.4L (LE5, LE9, LAT, LAF, LEA, LUK)
• Chevrolet Cobalt (including SS), HHR (including SS), Malibu, Equinox; Pontiac Solstice/G5/G6; Saturn Ion (including Redline), Sky, Vue, Aura; Saab 9-3; Buick Regal/Verano; GMC Terrain; Polaris Slingshot; and custom swaps

Important Notes:

• Designed for off-road/competition use — may cause slower warm-up or overcooling in cold climates
• ECU tuning recommended for fan settings and temp monitoring
• Professional installation advised; always bleed system thoroughly

Proudly prepared by BK Racing Inc. — Ecotec specialists delivering proven cooling mods trusted for reliable performance under pressure.

Take control of your Ecotec temps — install the BK Racing Thermostat Restrictor and run stronger today!