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Lock Down Rear Subframe Slop And Dial In Squat Characteristics
The factory rear subframe bushings on the S-chassis and Z32 allow enough compliance to introduce bump steer and inconsistent traction under hard acceleration. This Whiteline KCA349 sub-frame align and lock kit reduces that compliance and lets you change subframe inclination to induce rear squat for maximum traction or anti-squat for controlled drift setups.
Key Features
- Reduces rear subframe bushing compliance for a more locked in rear end
- Allows inclination change to induce rear squat or anti-squat handling characteristics
- Helps eliminate unwanted bump steer for more predictable steering response
- Includes extreme pressure moly disulfide grease with internal grease reservoirs for long service life
- Specially bonded construction built for high load bearing rear subframe applications
- KCA349 shares the same rear subframe design across the S13, S14, and Z32 platforms
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 1989-1994 | Nissan | 240SX | SE |
| 1995-1998 | Nissan | 240SX | SE |
| 1990-1996 | Nissan | 300ZX | Turbo |
Specifications
| Detail | Value |
|---|---|
| Manufacturer | Whiteline |
| MPN | KCA349 |
| UPC | KCA349 |
| Position | Rear |
| Application | Sub-Frame Align and Lock Bushing Kit |
| Lubrication | Moly Disulfide Grease with Internal Reservoirs |
| Note | May Increase NVH Levels |
What's Included
- Rear sub-frame align and lock bushing kit
- Extreme pressure moly disulfide grease
- Required hardware for installation
About Whiteline
Whiteline designs and manufactures suspension components engineered to sharpen handling while preserving daily drivability. Their caster and camber correction kits, control arms, and bushing sets use proprietary synthetic elastomers and precision engineered geometry to correct factory suspension compliance and unlock more consistent, predictable handling.
FAQ
What is the KCA349?The KCA349 is a Whiteline rear sub-frame align and lock kit that reduces subframe bushing compliance on the Nissan 240SX and 300ZX while allowing an inclination change for squat or anti-squat handling characteristics.
What does subframe inclination change actually do?Locating the bushing rings in different planes changes the subframe angle, which can induce rear squat for maximum traction or anti-squat characteristics favored in drift setups.
Will this kit increase noise or vibration in the cabin?Yes, the firmer bushing design that reduces compliance may increase NVH levels compared to the factory rubber bushings.
Does this kit help with bump steer?Yes, reducing subframe compliance helps eliminate unwanted bump steer for more predictable steering response.
Do I need an alignment after installing this kit?Yes, a full alignment is recommended after installation since subframe angle changes affect overall rear suspension geometry.
Can I install this kit in my home garage?Yes, this is a bolt in bushing kit that most installers with basic hand tools and jack stands can complete.
Is this kit intended for daily driven cars or track and drift builds?This kit is popular with both street enthusiasts seeking reduced bushing compliance and track or drift builds looking to tune squat and anti-squat characteristics.
Is this kit front or rear specific?This kit is for the rear subframe only and does not include any front suspension components.
Install Instructions
- Raise and safely support the rear of the vehicle on jack stands
- Support the rear subframe and remove the factory subframe mounting bushings
- Apply the supplied moly disulfide grease to the new Whiteline bushing components
- Install the new align and lock bushing kit into the subframe mounting points
- Torque all fasteners to factory specification
- Lower the vehicle and have a professional alignment performed
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