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Perrin Sway Bar - 25mm, Rear Kit
Part #: PSP-SUS-203
$309.99
$303.79
For each
For each
Free Shipping! *to continental U.S. only
Fits On:
93-01 Impreza / 02-07 Impreza 2.5 / 02-07 WRX
Description:
The only way to make your car turn, stop or go is if the entire available tire patch is hitting the surface at hand. The factory included what many regard to be a whimsical attempt to increase cornering with puny sway bars on the front and rear. PERRIN™ sees the need for far larger and stronger sway bars and now offers two options for both ends of your car.
For street enthusiasts that simply want to attack the drive to work with more gusto, the 22mm (7/8”) upgrade is the ideal choice. While dedicated track hounds will delight in the increased snap now available from our 25mm (1”) offering. Each size and each end also incorporates 3adjustment holes to help you custom tailor your suspension to your specific needs and driving habits. Made from solid steel and heavily powder coated to prevent the rigors of salty roads that wreck havoc with less worthy products. All kits include polyurethane pocketed bushings to prevent tedious re-greasing and all necessary hardware fora clean, and painless installation.
Endlinks
Also any rear bar can be purchased with or with out our endlinks. PERRIN™ recommends the use of upgraded endlinks to take full advantage of any swaybar upgrade. Endlinks are the connection between the swaybar and the suspension arms. Any upgrade to the sway bars are nearly lost if you chose to reuse the OEM endlinks. This connection between the sway bar and the suspension arm is crucial to proper operation.Some Subaru models use plastic (yes plastic) to make this connection.PERRIN™ Endlink are made from 6061 billet aluminum and use spherical bearings. This provides a solid non-flexible connection from the swaybar to the control arms.
Stout Mount
Any rear bar can be purchased with or without the added benefits of our Stout-Mount™ system. Another factory flaw is the connection between the unibody and the rear sway bar. Subaru chose to use cheap stamped steel.While great to keep costs down it certainly won’t help you go around that next bend in anything resembling a spirited fashion. Impreza owners can take full advantage of the 6061 billet aluminum mounts, and Legacy owners get added reinforcement from cold rolled steel with a two stage silver powder coat for years of beauty and performance.
Look under your WRX. Go ahead, we’ll wait…. See that little sway bardown there? Replace it with a PERRIN Performance sway bar and wepromise better cornering, reduced body role and greater control overyour suspension. PERRIN Performance™ Sway Bars are bigger in diameterand come with multiple end-link attachments, giving you 5 possibleconfigurations.
How does a sway bar work?
First understand that a tire has flat contact patch. If the contactpatch is not parallel to the ground, the contact patch gets smaller. Inturn traction is lost. As the car makes its way through a turn, theweight of the car, causes the car to lean. As the car leans, the designof the suspension geometry makes the tires contact patch becomeunparallel to the ground. In turn loosing traction.
Suspension designers used camber to help counteract this, along withunequal control arms. But a large part of keeping the tire parallel tothe ground during cornering is controlling how much the car leans. This is where sway bars come into play. During cornering the sway baracts to keep the chassis from leaning. In turn this helps keep thetires parallel to the ground. Stiffening up the springs on the cardoes the same thing, but in turn makes the ride much harsher. Swaybars are like stiff springs but only become effective while cornering.
Swaybars connect both left and right control arms with a torsion bar.As the control arms move up and down together, the bar moves withthem. During this state the sway bar has no effect. Only when thecontrol arms move in opposite directions does the sway bar come intoplay. During a corner, the outside arm moves up and the inside armmoves down, in turn causing the sway bar to twist. The opposingdirections of the arms are counteracted by the sway bar and the swaybar tries to keep the arms from moving in opposite directions. In turnkeeps the car from leaning less, and give you more traction!
Why do I want this?
That is easy to keep the contact patch as flat to the ground aspossible! Both front and rear sway bars do different things to cars. Both front and rear sway bars increase traction to the outside tire(the one with the most load), but a balance of front to rear can changehow the car handles.
All cars are designed to have a slight amount of understeer. This isdone for safety reasons. Understeer is the effect when you go into acorner, and your turn the wheel, but the car goes straight. This isalso known as pushing or plowing. In contrast Oversteer is when you gointo a corner, and the car turns more than you steer. This is alsodescribed as the rear end feeling like it is sliding out slightly. Toomuch oversteer and you will spin out in a corner. Too much understeerand the car will not turn through the corner, and go straight off theroad.
Generally people prefer neutral handling or a slight amount ofoversteer. With the choices in bar sizes and endlink settings, anyonecan find the perfect match to their driving style.
Hollow vs. Solid
Given both are designed to produce the same rate or stiffness, theyboth do the same job. But in order to get a hollow bar to produce thesame rate, a very large diameter is needed. And for those wantingsomething with a high rate or stiffness, you won’t be able to find thisin a hollow bar. Another benefit hollow bar makers try to sell is theweight. The difference in weight is very very small. To give anexample, a rear WRX PERRIN sway bar weighs 10.8lbs. Even if you removethe entire bar, the savings isn’t much. If weight is that critical,you can always remove your spare and save more weight. All PERRIN swaybars are made with solid 4140 Steel bar. This provides the best in bothstiffness and durability, and creates a bar that will last forever.
Bushings
All PERRIN swaybars use custom made polyurethane bushings. We wentdirect to the experts on this and that is why you will find 100%genuine Energy Suspension bushings. All of our bushings use a highdurometer (really stiff) urethane to ensure the most from your swaybar. A common problem with urethane bushings is the squeak really badwhen the grease dries up. PERRIN performance has custom internalspiral cores for each bushing. This allows the grease to stay in thebushings, and constantly lube the sway bar. In turn this makes forlonger service intervals compared to traditional smooth bushings. Thisis a small detail that other sway bar manufactures don’t offer!
The only way to make your car turn, stop or go is if the entire available tire patch is hitting the surface at hand. The factory included what many regard to be a whimsical attempt to increase cornering with puny sway bars on the front and rear. PERRIN™ sees the need for far larger and stronger sway bars and now offers two options for both ends of your car.
For street enthusiasts that simply want to attack the drive to work with more gusto, the 22mm (7/8”) upgrade is the ideal choice. While dedicated track hounds will delight in the increased snap now available from our 25mm (1”) offering. Each size and each end also incorporates 3adjustment holes to help you custom tailor your suspension to your specific needs and driving habits. Made from solid steel and heavily powder coated to prevent the rigors of salty roads that wreck havoc with less worthy products. All kits include polyurethane pocketed bushings to prevent tedious re-greasing and all necessary hardware fora clean, and painless installation.
Endlinks
Also any rear bar can be purchased with or with out our endlinks. PERRIN™ recommends the use of upgraded endlinks to take full advantage of any swaybar upgrade. Endlinks are the connection between the swaybar and the suspension arms. Any upgrade to the sway bars are nearly lost if you chose to reuse the OEM endlinks. This connection between the sway bar and the suspension arm is crucial to proper operation.Some Subaru models use plastic (yes plastic) to make this connection.PERRIN™ Endlink are made from 6061 billet aluminum and use spherical bearings. This provides a solid non-flexible connection from the swaybar to the control arms.
Stout Mount
Any rear bar can be purchased with or without the added benefits of our Stout-Mount™ system. Another factory flaw is the connection between the unibody and the rear sway bar. Subaru chose to use cheap stamped steel.While great to keep costs down it certainly won’t help you go around that next bend in anything resembling a spirited fashion. Impreza owners can take full advantage of the 6061 billet aluminum mounts, and Legacy owners get added reinforcement from cold rolled steel with a two stage silver powder coat for years of beauty and performance.
Look under your WRX. Go ahead, we’ll wait…. See that little sway bardown there? Replace it with a PERRIN Performance sway bar and wepromise better cornering, reduced body role and greater control overyour suspension. PERRIN Performance™ Sway Bars are bigger in diameterand come with multiple end-link attachments, giving you 5 possibleconfigurations.
How does a sway bar work?
First understand that a tire has flat contact patch. If the contactpatch is not parallel to the ground, the contact patch gets smaller. Inturn traction is lost. As the car makes its way through a turn, theweight of the car, causes the car to lean. As the car leans, the designof the suspension geometry makes the tires contact patch becomeunparallel to the ground. In turn loosing traction.
Suspension designers used camber to help counteract this, along withunequal control arms. But a large part of keeping the tire parallel tothe ground during cornering is controlling how much the car leans. This is where sway bars come into play. During cornering the sway baracts to keep the chassis from leaning. In turn this helps keep thetires parallel to the ground. Stiffening up the springs on the cardoes the same thing, but in turn makes the ride much harsher. Swaybars are like stiff springs but only become effective while cornering.
Swaybars connect both left and right control arms with a torsion bar.As the control arms move up and down together, the bar moves withthem. During this state the sway bar has no effect. Only when thecontrol arms move in opposite directions does the sway bar come intoplay. During a corner, the outside arm moves up and the inside armmoves down, in turn causing the sway bar to twist. The opposingdirections of the arms are counteracted by the sway bar and the swaybar tries to keep the arms from moving in opposite directions. In turnkeeps the car from leaning less, and give you more traction!
Why do I want this?
That is easy to keep the contact patch as flat to the ground aspossible! Both front and rear sway bars do different things to cars. Both front and rear sway bars increase traction to the outside tire(the one with the most load), but a balance of front to rear can changehow the car handles.
All cars are designed to have a slight amount of understeer. This isdone for safety reasons. Understeer is the effect when you go into acorner, and your turn the wheel, but the car goes straight. This isalso known as pushing or plowing. In contrast Oversteer is when you gointo a corner, and the car turns more than you steer. This is alsodescribed as the rear end feeling like it is sliding out slightly. Toomuch oversteer and you will spin out in a corner. Too much understeerand the car will not turn through the corner, and go straight off theroad.
Generally people prefer neutral handling or a slight amount ofoversteer. With the choices in bar sizes and endlink settings, anyonecan find the perfect match to their driving style.
Hollow vs. Solid
Given both are designed to produce the same rate or stiffness, theyboth do the same job. But in order to get a hollow bar to produce thesame rate, a very large diameter is needed. And for those wantingsomething with a high rate or stiffness, you won’t be able to find thisin a hollow bar. Another benefit hollow bar makers try to sell is theweight. The difference in weight is very very small. To give anexample, a rear WRX PERRIN sway bar weighs 10.8lbs. Even if you removethe entire bar, the savings isn’t much. If weight is that critical,you can always remove your spare and save more weight. All PERRIN swaybars are made with solid 4140 Steel bar. This provides the best in bothstiffness and durability, and creates a bar that will last forever.
Bushings
All PERRIN swaybars use custom made polyurethane bushings. We wentdirect to the experts on this and that is why you will find 100%genuine Energy Suspension bushings. All of our bushings use a highdurometer (really stiff) urethane to ensure the most from your swaybar. A common problem with urethane bushings is the squeak really badwhen the grease dries up. PERRIN performance has custom internalspiral cores for each bushing. This allows the grease to stay in thebushings, and constantly lube the sway bar. In turn this makes forlonger service intervals compared to traditional smooth bushings. Thisis a small detail that other sway bar manufactures don’t offer!
Okay, word association time -- what comes to mind when you think of the word "Oregon?" Maybe trees, or the people who hug them? Possibly, but if you're a speed freak like us, you probably think more along the lines of "Rally America" and "Perrin Performance." Perrin, a part of the Alta Performance Group, began manufacturing specialized aftermarket parts more than a decade ago. They cater especially to high-power sport compact cars, including Subarus, Evos, and more. Perrin has the heavy-hitters of Japanese all-wheel drive performance covered with parts that are built in the U.S., and just as importantly, built to last. With the full line of Perrin Performance products available, Andy's Auto Sport is here to help turn your car into a beast!
Q: Is an anti-sway bar the same as a sway bar?
A: Anti-sway bar and sway bar are two terms that mean exactly the same thing.
Q: What are sway bars? Why buy a sway bar?
A: Sway bars give your car additional stability. A sway bar is a metal bar that spans the whole entire axle and joins each side of your suspension together. Aftermarket sway bars they are usually thicker than factory ones, which means they will create a more level ride, reducing body roll and under steer. With a new sway bar, you can accelerate into turns instead of braking through them.
Q: How do you install a sway bar?
A: Sway bars are installed by removing your factory end links and sway bar. Re-install the new bushings and position your new sway bar on the vehicle in the OEM location and secure it with the same bolts.
Q: Are sway bars available for the front and rear of each vehicle?
A: One sway bar is used to tie the front suspension together, and one is used to tie the rear suspension together, so for maximum suspension upgrade, you could buy a front and rear sway bar. When available, they are often sold in complete sets that include the front and the rear.
A: Anti-sway bar and sway bar are two terms that mean exactly the same thing.
Q: What are sway bars? Why buy a sway bar?
A: Sway bars give your car additional stability. A sway bar is a metal bar that spans the whole entire axle and joins each side of your suspension together. Aftermarket sway bars they are usually thicker than factory ones, which means they will create a more level ride, reducing body roll and under steer. With a new sway bar, you can accelerate into turns instead of braking through them.
Q: How do you install a sway bar?
A: Sway bars are installed by removing your factory end links and sway bar. Re-install the new bushings and position your new sway bar on the vehicle in the OEM location and secure it with the same bolts.
Q: Are sway bars available for the front and rear of each vehicle?
A: One sway bar is used to tie the front suspension together, and one is used to tie the rear suspension together, so for maximum suspension upgrade, you could buy a front and rear sway bar. When available, they are often sold in complete sets that include the front and the rear.
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