THE DEFINITIVE GUIDE TO JDM MAZDA RX-7 FD 13B-REW ENGINE FOR SALE

For each apex (corner of a triangle) within the rotor, there’s a seal that keeps the corresponding chamber airtight, and each apex seal is loaded using a flat spring to maintain contact with the housing. Apex seals and springs are envisioned to wear out after all around 100,000 miles or significantly less, but there are actually other results in