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1984 Ford Bronco II Exhaust Plan Diagram - Flowmaster 40 Delta, 2.5" Turn Downs

Schematic exhaust routing diagram depicting stock headers, catalytic converter, Flowmaster 40 muffler, 2.5 inch piping and turn-downs.

AI caption · Photo 34 of 125

This is a hand-drawn exhaust system plan (schematic) uploaded to a 1984 Ford Bronco II gallery, showing a planned dual turn-down exhaust layout viewed from above/behind the vehicle. The drawing depicts the engine with stock headers labeled "(for now)", feeding into the stock catalytic converter (also labeled "for now"), then into a Flowmaster 40 delta series muffler. From the muffler, 2.5-inch piping runs to both sides of the vehicle, ending in turn-downs on the left and right ahead of the rear axle. The rear axle and wheels are shown at the bottom of the sketch for spatial reference. A reader can learn the intended exhaust routing: single path from headers through the stock cat into a single Flowmaster 40 Series Delta muffler, splitting into dual 2.5" pipes exiting via turn-downs on each side before the rear axle. The document contains no year, model, engine, torque, or part-number data beyond the muffler description; the "for now" notations indicate the headers and catalytic converter are temporary and slated for future replacement. This appears to be one page of a two-image set (the companion image is "exhaust path.jpg").

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Frequently asked questions

What muffler is planned in this exhaust diagram?
A Flowmaster 40 delta series muffler, placed after the stock catalytic converter.
What size exhaust piping is specified?
2.5" piping running from the muffler to turn-downs on both sides.
Are the headers and catalytic converter being replaced?
The diagram labels both the stock headers and stock cat as "(for now)", indicating they are being retained temporarily.
How does the exhaust exit in this plan?
Dual turn-downs, one on each side of the vehicle, located ahead of the rear axle.

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