Supra wheels will fit the SC coupe perfectly; However, the offset is slightly less in Supra wheels (Lexus +50mm, Supra +38mm). This is not a substantial enough difference to create steering issues, but the wheels will look like they are tucked in by a little under an inch. This difference can be remedied with H&R 15mm spacers. Supra TT wheels are 17x8F and 17x9.5R, while the Supra NA wheels are 16x7.5. Both sizes are offered in chrome, polished aluminum, and silver finishes.
Any OEM and aftermarket suspension designed for the MKIV Toyota Supra will also work with the SC coupe. This includes all Supra coilover packages. Ony thing you must consider when shopping for Supra lowering spring packages: you must swap the entire strut-spring assembly from the Supra rear end, not just the springs. Meaning if you purchase Eibach Supra Prokits, you must also purchase Supra-compatible strut shocks, because the rear strut perch on the Supra sets lower than the rear strut perch on the SC. If you attempt a Lexus shock with a Supra spring, you will actually lift the rear end of the car higher than stock. The front struts are the same on both cars however. You have the option of buying the OEM Supra shocks (cheapest), or aftermarket Tokico, KYB, etc shocks. It is recommended that you replace all four shocks together for uniformity, instead of just the rears if you go this route. Supra NA and TT shocks will fit the SC300 and SC400 fine. You do not have to worry about these compatibility issues when you buy Supra coilovers.
Supra OEM front and rear sway bars will fit the SC coupes provided that you use the Supra end link mounts - (info provided by PCMW). The stock Lexus sway bars have completely different end links.
Supra OEM control arms can be interchanged with SC control arms.
Supra braking systems will fit the SC coupes as a direct bolt-on provided that you use 17x8-inch wheels or larger with the proper offset. These are very large brake calipers, which require specific offsets to clear. You want at least 2 mm or more clearance between the calipers and the backside of the wheel spokes. It is not recommended that you compensate by shaving the brake caliper, and definitely not the wheel spokes. Supra braking systems will not fit on the SC300 or SC400 with stock Lexus wheels mounted.
The Supra TT Torsen 3.76:1 Limited-slip differential bolts up to the SC300/400 rear axle as well.
The TRD performance panel air filter made for the Toyota 4Runner and Supra (Part #: 00602-17801-002) will work with the SC coupes. These TRD filters nearly double the air flow capabilities of the stock intake system when combined with the Peter Scott BFI intake.
The front seats from a Supra directly bolt-on to the SC although you lose powered lumbar adjustment. 93-95 Supra seats are different from 96-98 Supra seats. Incidentally, you can also use stock Honda S2000 seats in the Supra and SC coupe.
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