Upgrading the brakes on a Lexus LS400 with components from a 1998 Toyota Supra Tt is a popular modification. This article details the process, necessary parts, modifications, and results of upgrading the front brakes with 1998 Toyota Supra TT calipers and rotors.
Why Upgrade to 1998 Toyota Supra TT Brakes?
The stock brakes on a Lexus LS400, while reliable, are smaller than optimal for performance driving. The 1998 Toyota Supra TT, known for its powerful engine, boasts a significantly larger braking system. Adapting these components to the LS400 provides a substantial increase in stopping power. This upgrade is particularly appealing to LS400 owners seeking improved performance without the expense of aftermarket big brake kits. The 1998 Toyota Supra TT brake system offers a cost-effective solution with proven reliability.
Parts Required for the 1998 Toyota Supra TT Brake Upgrade
A successful front brake upgrade requires the following components:
- 1998 Toyota Supra TT Front Calipers: Sourcing used calipers can save money, but new calipers offer peace of mind.
- Custom Rotors: Direct bolt-on rotors are not available. Custom drilled and slotted rotors designed for this specific application are necessary. Irotors.com is mentioned as one source for these custom rotors.
- Pin Kit: Ensure the calipers include the necessary pin kit or purchase one separately.
- Shims and Carrier Kit: These are available from Toyota dealerships.
- Brake Pads: Choose high-quality pads compatible with the Supra TT calipers, either OEM or aftermarket.
- Brake Lines: While optional, upgrading to stainless steel brake lines is recommended for improved performance and feel.
Installation Process and Modifications
The upgrade process involves several steps and requires minor modifications:
- Wheel and Caliper Removal: Remove the front wheels and stock brake calipers.
- Rotor Removal: Remove the stock rotors.
- Dust Shield Modification: The dust shield requires a 45-degree cut to clear the larger Supra TT caliper. A grinder is recommended for this modification. Removing the dust shield is not necessary.
- Rotor and Caliper Installation: Install the custom rotors and Supra TT calipers.
- Brake Pad and Shim Installation: Install new brake pads and shims.
- Brake Line Installation: If upgrading, install the stainless steel brake lines. Bleed the brake system thoroughly.
- Wheel Installation: Reinstall the wheels. Note: 17-inch or larger wheels are required to clear the upgraded brakes.
Results and Conclusion
The 1998 Toyota Supra TT brake upgrade significantly improves stopping power for the Lexus LS400. The larger rotors and calipers provide greater braking force and improved heat dissipation. This modification is a noticeable enhancement for spirited driving and offers a significant safety benefit. The upgrade requires minor modification to the dust shield and necessitates 17-inch or larger wheels. While the rear Supra TT brakes are not a direct fit, this front brake upgrade provides a substantial improvement in braking performance for a reasonable cost. The article concludes with a mention of exploring alternative rear brake upgrade options.
