SR Performance Lowering Springs (15-20 GT, EcoBoost, V6 w/o MagneRide)

10 More Questions

I have a 2015 gt convertible premium, would it be ok to install just the front springs and drive it that way for a while, and then put the rear springs on later? 1 answer

• Yes, that is an acceptable install method.

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I just ordered these springs and can't wait to put them on my 2015 GT, but will my tires rub? I have 20" staggered Shelby rims with 305 Micky Thompsom tires on the rear. 1 answer

• The SR Performance Lowering Springs will work with your build just fine and will not rub. Now going on over bumps or potholes we would recommend being cautious.

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For GT PP cars, how does ride/handling compare to the current springs on the car? Will these be stiffer or about the same? 1 answer

• The SR Performance Lowering Springs will have a stiffer spring rate which will give up ride quality for handling over the OEM Performance Pack springs. Additionally it should be noted that OEM Performance Pack cars do sit lower than a non Performance Pack cars so the full 1.5" of lowering would not be seen on cars equipped with the Performance Pack.

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I have 20x10 (niche surge) wheels on 305/30/20 tires, will it rub? 1 answer

• With the SR Performance Lowering Springs and 20x10 Niche Surge wheels with 305's in the rear, fitment will be tight, but should not rub.

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What is the spring rate of these springs? 1 answer

• Hello! The Spring Rate for the front of the SR Performance Lowering Springs is 185-275 lb/in. The rear spring rate is 800-880 lb/in.

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I have 20x10.5 rims and 285 tires in the rear with 20x9 and 255 in the front. If I combined these springs with the 1 inch spacers, will I rub? 1 answer

• It would be difficult to say if the installation of the SR Performance Lowering Springs and a one inch spacer would cause rubbing without additional information such as the offset of the wheels. The best way to see if there is sufficient space would be the measure the drop in height from where your wheels sit now, and also measure an inch from the wheel outward. If you perhaps would be able reach out to us via phone or email with further details, we would be more than happy to take a further look into the issue at hand.

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Do you need a alienment 1 answer

• We highly recommend getting an alignment any time you change the suspension on your car. This will ensure there is no unnecessary wear on your tires or other suspension components.

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Would these springs work with my set up? I have 285s in the front and 305s in the rear. I have 19X10 wheels in the front and 19X11 in the rear. The front wheel has an offset of 35mm and the rear wheels have an offset of 50mm. I was wondering what I would need also if I went with these springs and if the springs would clear the tires! 1 answer

• There is a possibility the front tires will rub. We can guarantee fitment as large as 275 up front with up to a 2 inch drop, which isn't to say a 285 definitely won't fit, we just can't guarantee it would. I would suggest measuring to be safe. Rear, you can go as large as 305s up to 2 inches so you're good to go there.

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What is the best size rims and tire in the front, and what size rims and tire in the back for this lowering springs 1 answer

• There isn't really a "best" size. The biggest you can fit in the rear will be a 305, the biggest up front will be a 275.

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Hi, do you have the K value of these springs? 1 answer

• We do not have this information on hand, but can indeed lend the spring rate below: Front: 185-275 lb/in.Rear: 800-880 lb/in.

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