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I've driven the speed3 ...

The suspension is much stiffer, it has to be...

As far as the difference of suspension... on the speed3, they relocated the front tie rod for better handling...

the rear stay's the same as far as design... I believe the rear shocks & springs have been beefed up also...

the spring rate is probably different....

but none of the suspension parts on the speed3 are mazdaspeed parts
 

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Information from http://media.ford.com/newsroom/release_display.cfm?release=24178

"HIGH BODY RIGIDITY AND SPECIALLY TUNED CHASSIS

Like the 2007 MAZDA 3, the new MAZDASPEED3 features a body with increased rigidity. The MAZDASPEED version is based on the MAZDA 3 5-Door hatchback, with local reinforcements added to produce a body sufficiently stiff to stand up to the demands of 263 horsepower. Suspension and brakes have also been specially tuned.

Body rigidity has been increased through several measures, including a reinforced front cowl that is joined directly to the top section of the front damper mount, assuring the same rigidity as a car fitted with a strut tower bar (which would not have been possible because of the placement of the intercooler above the engine). This prevents deformation of the front suspension towers under cornering load and maintains correct suspension geometry. Underneath the car, a large closed-section brace is employed to reinforce the floor tunnel which improves the torsional rigidity of the whole body. At the rear, a gusset added to the bottom of the rear suspension towers maintains the correct suspension geometry under all cornering loads.

Both the MacPherson strut front suspension and multi-link rear suspension have higher spring rates and larger diameter stabilizer bars than the standard MAZDA 3. Damping force on both compression and rebound is raised approximately six-times at low piston speed, and about 1.3 times at moderate piston speed. Ride height is 10 mm lower than a standard MAZDA3. In combination with the reinforced springs and stabilizer bars, this produces 60 percent more roll stiffness than the standard MAZDA 3."
 

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suspension system

can a mazda 3 suspension be used on a mazdaspeed 3 1st generation . I just purchased it and it was lowered by prior owne_
 
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