anyone tried these?
http://cgi.ebay.co.uk/Bosch-Super-4...18&_trksid=p3286.c0.m14&timeout=1218817163981
seem pretty cheap for plugs for a 172?
http://cgi.ebay.co.uk/Bosch-Super-4...18&_trksid=p3286.c0.m14&timeout=1218817163981
seem pretty cheap for plugs for a 172?