The piece was on all the older LS1's and 6's. The early vettes had them drilled for a metric fitting. GM should still stock it. Call SDPC. I think Linginfelter makes one and TPIS also has one they are $$ . I drilled and tapped mine , but have since moved the temp sensor to the oil pan.
99 Hugger Orange 1LE Camaro A4
New Combo L-92 Block and Heads 416ci
Built by The Head Shop. The heads are fully ported, L76 intake, custom FTI cam and valve train. Tuned by Flaco.Dyno results 508 hp at 5800. Best time 10.01 @ 138.
Thanks to Jerry, Shawn,Ed,Flaco,and Richard.
04 2500HD 4x4 The parts Chaser . Soon to be a 408
85 K-10 GM crate 350