MM News

MM Coronavirus Update

We’re changing our phone hours to 9:00 AM to 3:00 PM Pacific Time (Monday-Friday, excluding holidays) so we have more time to process orders and get them out to you.

Please be aware
Our supply chain is suffering major pandemic-related disruptions. Many of our suppliers shut down for a time, and like us are operating with reduced manpower. Meanwhile, demand for MM products has skyrocketed. Thank you! We’re a small company and we regret our website isn’t fancy enough to inform you of back orders when you buy something. Please understand that we’re working as fast as we can to fill your orders.

UPS Shipping Times As of March 24, UPS no longer guarantees the shipping time for any shipment. i.e., expect shipping time to lengthen.

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Matching Mustang spring rates

Each table lists a series of struts and shocks. Within each table, springs are recommended for the different front and rear suspension configurations of a Mustang.

MM Sport Series Spring Recommendations
Stock Location Springs H&R Race
H&R Super Race
Coil-Over Spring Rates
Front Springs 350 - 400 lb/in
Solid Axle Rear Springs 225 - 300 lb/in
IRS Rear Springs 500 - 600 lb/in



MM2 Race Series Spring Recommendations
Stock Location Springs H&R Super Race
Coil-Over Spring Rates
Front Springs 400 - 425 lb/in
Solid Axle Rear Springs 275 - 325 lb/in
IRS Rear Springs 600 - 650 lb/in



MM3 Race Series Spring Recommendations
Stock Location Springs Not recommended
Coil-Over Spring Rates
Front Springs 450 - 500 lb/in
Solid Axle Rear Springs 325 - 375 lb/in
IRS Rear Springs 650 - 700 lb/in



Bilstein Heavy Duty (HD) Series Spring Recommendations
Stock Location Springs MM Road & Track
H&R Race
H&R Super Sport
H&R Sport
Eibach Pro-Kit
Stock Springs
Coil-Over Spring Rates
Front Springs 250 - 325 lb/in
Solid Axle Rear Springs 175 - 250 lb/in
IRS Rear Springs 475 - 525 lb/in



Bilstein OEM 2000 Cobra R Spring Recommendations
Stock Location Springs Ford 2000 Cobra R
Coil-Over Spring Rates
Front Springs Not recommended
Solid Axle Rear Springs Not available
IRS Rear Springs 575 - 650 lb/in



Tokico Premium Performance Spring Recommendations
Stock Location Springs Stock Springs
Eibach Pro-Kit
H&R Sport
Coil-Over Spring Rates
Front Springs Not recommended
Solid Axle Rear Springs Not available
IRS Rear Springs Not available



Tokico Illumina Spring Recommendations
Stock Location Springs Stock Springs
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race
Coil-Over Spring Rates
Front Springs 250-325 lb/in
Solid Axle Rear Springs Not available
IRS Rear Springs Not available



Tokico D-Spec Spring Recommendations
Stock Location Springs Stock Springs
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race
H&R Super Race
Coil-Over Spring Rates
Front Springs 150-375 lb/in
Solid Axle Rear Springs Not available
IRS Rear Springs Not available



Koni Single Adjustable Sport Spring Recommendations
Stock Location Springs Stock Springs
MM Road & Track
Eibach Pro-Kit
H&R Sport
H&R Super Sport
H&R Race
Coil-Over Spring Rates
Front Springs 275-375 lb/in
Solid Axle Rear Springs Not available
IRS Rear Springs 475-525 lb/in



Koni Double Adjustable Sport Spring Recommendations
Stock Location Springs MM Road & Track
H&R Race
H&R Super Race
Coil-Over Spring Rates
Front Springs 325-525 lb/in
Solid Axle Rear Springs 200-375 lb/in
IRS Rear Springs Not available