I want the extra torque in the low revs so I couldn't resist hunting down an N53 330i manifold
Next dillema, is it something I should tell the insurance company about? I can't imagine they'd ever realise that I had an upgraded manifold, but not sure if it's worth the risk especially as I'll be upgrading the exhaust so they'll know it's a missed car. Did anyone's insurance increase by much or get revoked? Anyone not bothered telling them?