Exhaust pipe totally made of stainless steel with tig weld, manifold attached direct to the head with anti-vibra springs between manifolds and semimanifolds, all manifold lengths are identical in order to have the maximum engine performance. curved exhaust terminal in order not to hit on the rear crossbar. terminal output diameter 50 cm and manifold diameter 38 cm. it fits on fiat 500 f-l-r and 126 classic. 100% made in italy. stainless steel. excellent sound.