![Bilstein Street Rod 15in. ALU 2.5in. Coilover R 135/37 46mm Monotube Shock Absorber](http://roco4x4.com/cdn/shop/files/1ce251b5cdf396be61fe9918f87ff631_602ec0d6-0e41-4146-a38e-aaf6c5238514_700x700.jpg?v=1715387318)
![Bilstein Street Rod 15in. ALU 2.5in. Coilover R 135/37 46mm Monotube Shock Absorber](http://roco4x4.com/cdn/shop/files/1ce251b5cdf396be61fe9918f87ff631_602ec0d6-0e41-4146-a38e-aaf6c5238514_700x700.jpg?v=1715387318)
Description
Bilstein CA4 Series shock absorbers are designed specifically for custom street rod applications that require unique lengths and valve settings for the proper chassis setup. Built around a billet aluminum monotube design, these shock absorbers feature a 46mm piston, threaded body, 5/8 inch polyurethane bushing mounts and various lengths and valve settings to choose from. Each shock absorber is supplied with a hard anodized spring seat, lock ring, and hat to accommodate a 2.5 inch ID spring. Bilstein CA4 Series shock absorbers provide a wide range of options to support any custom street rod application need.