Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
High performance carbon fiber intake
Only to be used with the select pulley and Harrop Supercharger kit
This product was last offered at the strikethrough price on
05-07-2026
Matched set with connections
Engages water-methanol system at 35PSI Adjustable from 25-50psi
Includes 2.5 gallon tank, red high temp nylon tubing, and quick-connect fittings
D=62.3MM, To connect the exhaust pipes
For John Cooper Works Kit
Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button
Aftermarket performance intake and exhaust valve springs for your high revving engine
Aftermarket performance intake and exhaust valve springs for your high revving engine
Performance pistons in +1.00 size
Replaces the complete standard airbox
Quick connect union T-fitting for 1/4" Nylon
More aggressive cams for higher top end power!
Larger intercooler for the JCW GP edition
10X Entries For Our 25th Anniversary Sweepstakes!
This product was last offered at the strikethrough price on
05-02-2026
Water to air intercooler system that reduces heat much faster than the stock air to air system