FC3S 13B-T Rail Set


Injector Dynamics Injectors

O-ringed Fittings

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13B-T FC3S Primary and Secondary Fuel Rail

The diffusers must be removed.

Includes Lower O-Ring Inserts

Black Color Only

48mm Primary Fitment Only

Fitment: 86-91 Mazda RX7 (S4 and S5 13B-T) w/ Aftermarket Top Feed Injectors (14mm o-ring)


1/2″ Bore – Suited for high horsepower needs
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.

Save and add Injector Dynamics injectors!

Injectors supplied with our o-ringed lower inserts when purchased with rail.

Additional information

Weight .5 lbs
Dimensions 12 × 4 × 4 in
FC Secondary Rail Fitment

S4 (86-88), S5 (89-91)