Will wrote >Seems to me I remember reading - probably on this very Digest - that neither Shankle nor anyone else had come up with exhaust headers that worked better than the factory Euro pipes, and that the only reason to fit non-factory ones would be to reduce weight, or in the case of a racing car if the exhaust were to be re-routed. This was back when Shankle and Alfa Ricambi were still in business and sending out catalogs; I do remember that no specific power gain was claimed for the headers, only some unquantified "free-flow" benefits.
I do think they were made to fit all the 105 engines, which I believe sit at exactly the same place in the chassis whatever the body. So neither match-up to the exhaust ports nor ground clearance should be an issue.< Will's memory is not so good on this. Shankle published a table of HP vs rpm for the stock Alfetta manifold, Shankle Alfetta headers, Shankle Spider/GTV headers, Stock GTV6 manifold and Shankle GTV6 headers. The HP gain at 6000 rpm was 9 or 10 HP for the 4 cylinder engines and 15 HP for the 6 cylinder engines. In contrast to some other aftermarket headers, Shankle's were well made and fit properly. My Spider has had the same set for at least 12 years, and probably more. The table is on page 10 of the Shankle Alfa Romeo catalog. Ed Prytherch, Columbia SC -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
