BBK Progressive Rate Lowering Springs (79-04 V8, Excluding 03-14 Cobra)

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Why won't these work on my 2003 v6 covertable????? 1 answer

• These are not compatible with convertible models due to suspension differences with coupe models.

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I ordered these springs along with the KONI STR.T Rear Shocks and Strut kit SR Performance Caster Camber Plates. I also ordered the 2003 Cobra Style 17x9 wheels. I have 275/40/17 on order with Americas Tire for the rear wheels and 245/45/17's for the front. Will the 275's fit with no issue with the aforementioned set up, or do I need to adjust anything to avoid any rubbing issues? I keep seeing that I should flip the rear quad shocks. Thanks! 1 answer

• You will not have any issues with this setup no.

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It says 79-04 V8. This wouldn't fit an 01 V6? And if so, why not? I thought the GT and V6 had identical suspension parts and fitment. 1 answer

• This would not fit the V6, due to fitment differences this would only fit the V8.

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Hi.i own a 1990 mustang convertible. Am planning on installing full length subframe connectors.will i have clearance issues with bbk lowering coils? 1 answer

• While these BBK Progressive Rate Lowering Springs will lower the vehicle, most jacking rails will stay in-line with the pinch welds so clearance may not be an issue. If the jacking rails extend past the pinch welds then there may be some issues.

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Can I fit this kit with the AM 18 cobra R Pkg 285/35/18 rears 265/35/18 Nitto 555 will it rub on corners on a 95 convert GT 1 answer

• Hello! The BBK Lowering Springs - Coupe & Convertible should not cause rubbing issues with your tire setup.

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Will I need Caster/Camber plates with these? Running 17x8 on the front with 245s? Thanks in advance. 2 answers

• The BBK Lowering Springs - Coupe & Convertible - Specific Rate (79-04 GT, Mach 1; 93-98 Cobra) will not require caster camber plates for the install, however we do recommend them to help fix the alignment.

• The BBK Lowering Springs - Coupe & Convertible - Specific Rate (79-04 GT, Mach 1; 93-98 Cobra) will most likely need caster camber plates. The issue is, there is no right answer, every mustang reacts differently to being lowered, however it is more than likely that you will need them.

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I assume a GT Convertible will drop more than a coupe due to the weight. How much more drop? And how much difference is there with and without isolators? Thanks! 1 answer

• When using these BBK Lowering Springs on a convertible, the spring will settle approximately 1/4" lower than a coupe. The isolators will add about 1/4"-1/2" height after settling down as well.

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I have an 01 gt on 20 inch staggered wheels would these springs fit? 1 answer

• Yes those rims are rated to handle a 2" drop. You should be good.

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Spring isos Are spring isos needed or do I have to order them with these springs. 3 answers

• You should definitely replace your front and rear spring isolators when installing a set of new lowering springs. They are more durable than the old, wore out stock isolators and will greatly improve your handling and steering response. They will also prevent any unwanted metal on metal grinding, keeping your ride smooth and and quiet. Hope this helps!

• I would, when I replaced my springs my old isos were all busted up an worn. Definitely worth the money

• I would never replace springs with out new isolators, they won't come with these springs so make sure to order them.

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