Aluminum vs cast iron cylinder head suspension effects

Ricks70Duster340 said
Moving to a larger torsion bar can vastly improve the handling of your car. I just went from OE bars to PST 1.03's and I have a lot less body sway without the ride being harsh. Good investment.

This might be a stupid question, but are the ends of the larger torsion bars the same size as the smaller ones?