Energy Suspension Universal 2 1/8in ID 4 1/8in OD 13/16in H Red Coil Spring Isolators (2 per set) Suspension>Lowering Kits and they are also sized

and they are also sized to allow you to mount two of them side by side

9L Cummins DF-100-5G Fuel Pump

Leak-Free Seal: A high quality stainless steel band clamp is used for a complete 360 degree sealing surface

Since then

BLOX Racing 15-18 Subaru WRX / WRX STi Vortex Generator - ABS Black

Energy Suspension Universal 2 1/8in ID 4 1/8in OD 13/16in H Red Coil Spring Isolators (2 per set) Suspension>Lowering Kits and they are also sizedMade of superior Hyper Flex (TM) material. Saves replacing again and again, lasting 3 to 10 times longer. Assemble to chassis the same way as OEM isolators and do not adversely change ride characteristics.