The engineers at CSI took an innovative approach to this new shock. 

We implemented unique design elements that surpass every quartermidget shock on the market.  Once you’re on the track your will be dominating with exclusive features like our optimum flow billet piston, tuned base valve assembly and low drag CSI “Gold” shaft coating.  New detent adjustable spring hardware is included with each RS-Junior shock.  Our unique approach to shock building that has won us countless championships worldwide is now available to all of our quarter midget customers.  Simply call tell us the class, driver weight and tracks your racing on and we will custom tailor a shock package to best suit your needs.  If you already know what you want that is fine too, we will keep your valvings confidential.  Not only will you be purchasing the finest quarter midget shock on the market you will be receiving the same great customer service that hundreds of top teams have come to rely on. Make the change you will be glad you did!
Each RS-Junior comes complete with spring hardware.$225.00

JPM offers our own custom valving from CSI along with CSI factory valving. Give us a call to go over options to help take your shock program to the next level.


Body: Threaded Aluminum

Shaft: Machined Steel, Hardened, ground and CSI Gold Coated

Piston: 2013 CSI Optimum Flow Billet QM Piston

Basevalve: Tuned basevavle assembly

Eyelet:  Aluminum with premium spherical bearings

Compressed Length: 7.82

Extended Length: 10.19

Weight: 1lb


1” Extended Eyelet $32.05

CSI Shock Inflation Tool (0-60 psi) $95.00

CSI Shim Kit $99.95

JPM 3.5 inch QM Springs $24.99

JPM 5 inch QM Springs    $24.99

QM Tuning Kit $ 125.00

QM Repair Kit $175.00

Tall Spring Perch $23.50

NC Chassis 1" Spring Spacer $22.00 (pack of 2)