Schrick Manifold for the VR6 has variable length runners....As for the diameter, it would be nearly impossible because although you can get an opening to open/close, it is not possible to do it with a tube....moreso with a complex bend. -Steve H '88 16v Rocco -- Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send "unsubscribe scirocco-l" in the message to majordomo@scirocco.org