Upgrade your M3/M4's exhaust to make the S58's naturally aggresive tone shine!
Upgrade your M3/M4's exhaust to make the S58's naturally aggresive tone shine!
Upgrade your M3/M4's exhaust to make the S58's naturally aggresive tone shine!
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
Increase flow and performance and get that beautiful carbon look every time you open up your hood!
2X Entries For Our 25th Anniversary Sweepstakes!
Offers great strength and fatigue resistanve vs stock bolts, increasing clamping strength and preventing cylinder head lift and damage.
2X Entries For Our 25th Anniversary Sweepstakes!
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
08-21-2026
Full Frame Upgraded Twin Turbo Kit!
Eliminate your restrictive OEM inlet pipes and increase airflow to your turbos
Next-Gen Power Delivery with OEM-Level Integration - up to +50 HP / +40 TQ
2X Entries For Our 25th Anniversary Sweepstakes!
Next-Gen Power Delivery with OEM-Level Integration - up to +50 HP / +40 TQ
2X Entries For Our 25th Anniversary Sweepstakes!
For LCI Models Produced from 2025+
Add port injections with out the need for intake spacers with this plug and play kit
Add port injections with out the need for intake spacers with this plug and play kit
Engages water-methanol system at 35PSI Adjustable from 25-50psi
Includes 2.5 gallon tank, red high temp nylon tubing, and quick-connect fittings
Upgrade your M3/M4's exhaust to make the S58's naturally aggresive tone shine!
Upgrade your M3/M4's exhaust to make the S58's naturally aggresive tone shine!