Sanderson A-RED Angle Collector Reducers are used on exhaust headers to make it easier to connect header outlets to the under-chassis exhaust system piping. Select the reducer size to match the header outlet (collector) size. Various sizes are available:
Sold in Pairs:
- 3.0″ Reducer = 3.0″ to 2.5″
- 2.5″ Reducer = 2.5″ to 2.25″
Please Select the Correct Size for Your Application Below

Example of Use:
A header has a 3.0″ diameter collector, but the exhaust piping or head pipes are 2.5″ in diameter. A collector reducer would be used to merge the change in diameter from 3.0″ to 2.5″. The reducer bolts to the header collector, and then a qualified welder fits and welds the head pipe to the reducer.
NOTES :
- Some crafters prefer a one-piece head pipe with no weld connection. In that case, a muffler shop would bend a head pipe for the application with a flange and ring out of the desired material diameter to match your headers (i.e., 2.5″ collector = 2.5″ diameter head pipe). With this configuration, you would not need the reducer. Ask your muffler shop for more details.


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