Both SUVs feature sound deadening material to improve cabin quietness. The foam provides strength, buoyancy, and sound deadening. Much of the sound deadening material was also removed to reduce weight. Upper class trim levels also used acoustic deadening materials for quieter ride comfort. Bizzarrini these two cars were stripped of sound deadening, power steering etc. The 2.3 also received power steering and additional sound deadening material. It featured more powerful engines with sound deadening and without the fuel-hungry and noisy afterburner. He opposed all compulsion, including exams, as deadening to the human soul. Using someone else's words was deadening somehow.