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Stock exhaust manifold removed and underside exposed Red arrow points to casting bung in middle of the manifold. Yellow arrow points to twin-scroll actuator arm. After twin-scroll actuator arm removal, a ¼"NPT tap is used to thread the hole and a ¼"NPT plug is inserted. Please use either a brass (recommended) or steel plug, as aluminum plugs will melt! |
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GReddy EGT probe fitting and twin-scroll plug installed Red arrow points to GReddy EGT probe fitting installed. GReddy EGT probe fittings are 1/8"NPT stainless steel - use appropriate sized drill bit for drilling. Yellow arrow points to brass ¼"NPT plug installed. ¼"NPT plug is used to plug hole after twin-scroll actuator arm removed. ¼"NPT plugs can be found at any large, hardware chain store like Home Depot, Lowes, Eagle Hardware and Garden, etc. |
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Modified exhaust manifold installed on engine, front view GReddy EGT probe wire snaked through passenger side engine mount. Red arrow - GReddy EGT probe. Yellow arrow - ¼"NPT plug. |
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Another shot of the installed exhaust manifold from rear Red arrow - GReddy EGT probe. Yellow arrow - ¼"NPT plug. |