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.
Photo depicts the stock dual exhaust system for 1957 Ford Thunderbirds with the stock 292ci which is stock without resonators.
- System consists of the LS/RS exhaust pipes, LS/RS mufflers, LS/RS front tailpipes and LS/RS rear tailpipes.