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9905Scc Projrx7 004

9905Scc Projrx7 004
The stock downpipe (which contains a small pre-cat) is restrictive and retains heat in the engine compartment. The pre-cat also tends to deteriorate and clog, making the restriction worse. The M2 downpipe makes a huge difference in performance. 
Mazda Rx 7 Coupe Rear Right 9905Scc Projrx7 002 Zoom 9905Scc Projrx7 003 9905Scc Projrx7 03 Zoom 9905Scc Projrx7 004
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