Quote:
Originally Posted by jss06c6
Gents,
I note that the AC-Delco's I took out have a compression gasket rather than a taper.. The NGK's have a taper seat.. Is there another Iridium with a compression gasket??
Steve
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Steve, here is a link to the showing a plug with the washer. Don't know what heat range it is, but it is listed for the 91 ZR-1. They also show the tapered seat plugs for the 91.
http://www.autopartswarehouse.com/sk...-1/NG5464.html
I think either style plug will work in any year LT5 head, IIRC what I have read..
My plugs look similar to ours, but you got more mileage out of yours....lol