FFE FC3S 13B-T Rail Set S4

• 13B-T FC3S Primary and Secondary Fuel Rail
• The diffusers must be removed.
• Includes Lower O-Ring Inserts
• Black Color Only
• 48mm Primary & secondary rail fitment by default ( 60mm secondary optional by request) 
• Fitment: 86-91 Mazda RX7 (S4 and S5 13B-T)
•  These accept 6AN ORB fitting size
• O-ringed end fittings – No more Teflon tape/worn threads!
• Centering Spacers – Ensuring injectors are centered for no air/fuel leaks
• Stainless Hardware – High strength/corrosion resistant
• 13B-T’s require different lengths/combinations depending on S4 or S5.

S4 rails use 1 blue LIM sleeve & 1 purple( taller), S5 use 2x purple taller sleeves with installation.