1957 Thunderbirds stock with the 292ci V8 did not come with resonators so for this model the listing is correct to the stock system. This is a resonator delete option for 1956 models (regardless of the engine) and for 1957 stock with the 312ci.
- System consists of the LS/RS exhaust pipes, LS/RS mufflers, LS/RS front tailpipes and LS/RS rear tailpipes.