Next Level Performance
August 4, 2026 • 11 min read
Adding carbon fiber body parts to your Mazda RX-7 FD is the most effective way to cut weight from a car that Mazda already engineered around a “weight-first, power-second” philosophy. The 1993–1995 FD3S left the factory at roughly 2,789 lbs, and every panel you swap from steel to real carbon fiber shaves mass exactly where it hurts handling the most — high, wide, and at the corners. This install and fitment guide walks through the seven Seibon carbon fiber panels we stock for the FD3S, what each one actually saves, and how to fit them correctly in our Tampa, FL shop.
Our Verdict
Start with the Seibon Carbon Fiber Doors — they replace the FD3S’s heavy steel doors for the single biggest weight drop.
The FD’s hood is already aluminum from the factory, so the steel doors, fenders, and hatch are where carbon fiber pays off most. A full Seibon carbon door pair is the flagship upgrade at $3,420, with vented hoods, wide fenders, and a carbon hatch rounding out the build.
Shop Our Top Pick →Why Carbon Fiber Makes Sense on the FD3S RX-7
Carbon fiber is worth it on the FD3S because the third-generation RX-7 was built to be light before it was built to be fast. Chief engineer Takao Kijima obsessed over mass — the 13B-REW sequential twin-turbo rotary made 255 hp and 217 lb-ft in 1993 US trim, but the real party trick was a curb weight near 2,789 lbs with near-50/50 balance. Removing steel and replacing it with carbon keeps that ethos alive and improves the power-to-weight ratio without touching the engine.
The key nuance for FD owners: not every panel saves the same amount. The FD3S already uses an aluminum hood from the factory, so a carbon hood saves less than it would on a steel-hooded car — you buy it mainly for venting, heat extraction, and style. The doors, fenders, and hatch are steel, so those are where carbon fiber delivers the largest true weight reduction. Seibon carbon panels are typically 30–50% lighter than the steel parts they replace, and lowering weight up high (doors, hood, hatch) drops the car’s center of gravity for sharper turn-in.
Real carbon fiber doors replace the FD3S steel doors for the biggest single weight drop.
Before You Start: Tools, Prep and Fitment
Every Seibon carbon panel is a special-order, freight-shipped (LTL) item made from hand-laid carbon fiber under a UV-resistant clear coat, and all of them are designed for professional installation. Before you unbolt anything, gather the essentials: a trim/panel removal set, metric sockets and torque wrench, painter’s tape to mark hinge positions, a second set of hands for the doors and hatch, and — for any carbon hood — a set of hood pins and a factory-style heat shield.
The single most important rule with carbon hoods: Seibon requires hood pins and does not want the stock hood springs or struts reinstalled. A lightweight carbon hood can lift at speed if it relies only on the factory latch, so hood pins are a safety requirement, not a styling choice. A heat shield is also required to protect the underside from the twin-turbo rotary’s under-hood heat and prevent premature clear-coat aging. Dry-fit every panel and check panel gaps before final torque — carbon parts can need minor hinge and striker adjustment to match the FD3S body lines.
Step 1: Carbon Fiber Doors — The Biggest Weight Drop
The Seibon Carbon Fiber Doors (Pair) are the highest-impact upgrade on this list because they replace the FD3S’s heavy steel door shells. At $3,420 (part number DD9396MZRX7), they are a full carbon door assembly, not a skin, and they mount to the factory hinges. Because the doors sit high and outboard, shedding this much steel meaningfully lowers the car’s center of gravity and reduces swing weight when you open them in the pits.
Installation is a two-person job: transfer the latches, wiring, glass, and mirrors from the steel doors, hang the carbon doors on the factory hinges, then adjust the hinge and striker so the gaps match the front fender and rear quarter. Because the FD is a pure two-door coupe, getting the door-to-quarter gap even is the detail that separates a clean build from a rushed one.
Key Specifications
Step 2: Carbon Fiber Hoods — TS vs ST vs KS Styles
Seibon offers three carbon hood styles for the FD3S, each priced at $1,350: the TS style, the ST style, and the KS style. Because the FD’s factory hood is aluminum, you are buying a carbon hood for its vents, heat extraction, and aggressive look rather than a huge weight number. All three bolt to the factory hinges and, per Seibon, must run hood pins with the stock struts removed.
TS style is the most aggressive of the three, with functional venting that pulls hot air out of the engine bay — a real benefit on a heat-soaked sequential-turbo rotary. ST style is a cleaner, lower-key vented look for owners who want carbon texture without a full race aesthetic. KS style splits the difference with its own vent layout. All three are the same price, so the choice comes down to the look and airflow you want.
ST-style hood: a cleaner vented profile at the same $1,350 price.
KS-style hood offers a distinct vent layout for the FD3S.
Step 3: Fenders, Hatch and Door Panels
Beyond the doors and hood, three more carbon panels finish the FD3S build. The 10mm Wider Carbon Fiber Fenders ($1,305, FF9396MZRX7) add subtle width to clear a more aggressive wheel-and-tire setup while replacing steel with carbon at the front corners. The OEM-style Carbon Fiber Trunk/Hatch ($1,260, TL9396MZRX7) swaps the steel rear hatch for carbon — weight removed high and far back, right over the rear axle line.
Inside, the Carbon Fiber Door Panels (Pair) ($1,620, DP9396MZRX7) replace the factory interior door cards with carbon for a lighter, race-inspired cabin that pairs naturally with the carbon doors. It is the only interior panel in the group and is best installed at the same time as the carbon doors.
RX-7 FD Carbon Fiber Panels Compared
Here is every Seibon carbon fiber panel we stock for the 1993–1995 RX-7 FD3S, from the flagship doors down to the hatch. All are real carbon fiber with a 6-month limited clear-coat warranty and ship as special-order freight items.
| Panel | Type | Fitment | Price |
|---|---|---|---|
| Carbon Fiber Doors (Pair)Top Pick | Exterior doors | 1993–1995 FD3S | $3,420.00 |
| Carbon Fiber Door Panels (Pair) | Interior door cards | 1993–1995 FD3S | $1,620.00 |
| TS-Style Carbon Hood | Vented hood | 1993–1995 FD3S | $1,350.00 |
| ST-Style Carbon Hood | Vented hood | 1993–1995 FD3S | $1,350.00 |
| KS-Style Carbon Hood | Vented hood | 1993–1995 FD3S | $1,350.00 |
| 10mm Wider Carbon Fenders | Wide fenders | 1993–1995 FD3S | $1,305.00 |
| OEM Carbon Trunk/Hatch | Rear hatch | 1993–1995 FD3S | $1,260.00 |
How to Install and Care for Carbon Fiber Panels
Fitting Seibon carbon on the FD3S follows a repeatable sequence. Follow it in order and the panels line up with factory-quality gaps.
- Dry-fit first. Hang each panel and check gaps against the surrounding body before committing to final torque.
- Transfer hardware. Move latches, glass, wiring, and mirrors from the steel doors to the carbon doors; reuse factory hinges.
- Set the gaps. Adjust hinges and strikers so door-to-quarter and hood-to-fender lines are even side to side.
- Fit hood pins and heat shield. Install hood pins, remove the stock hood struts, and add a heat shield before driving.
- Protect the clear coat. Keep panels waxed or wrapped in UV film; carbon clear coat can yellow with sustained sun exposure.
Seibon backs every panel with a 6-month limited clear-coat warranty that covers heavy cloudiness under the clear coat, a clear-coat bubble larger than 3/8 inch, or a shade change of more than one full shade within six months. Because these are special-order freight items, inspect each panel for shipping damage before install and keep the packaging until you have confirmed fitment.
Inspect every carbon panel for shipping damage before final install.
Carbon Fiber on the FD3S: Pros and Cons
What We Like
- + Real weight loss where it counts — steel doors, fenders, and hatch go carbon
- + Lower center of gravity for sharper turn-in on a 50/50 chassis
- + Vented hoods pull heat off the twin-turbo 13B-REW
- + Bolt-on to factory hinges; no cutting for most panels
Things to Consider
- – Carbon hood saves less than on steel-hood cars (FD hood is already aluminum)
- – Hoods require hood pins and a heat shield; clear coat needs UV protection
- – Special-order freight items with a 6-month clear-coat warranty window
Frequently Asked Questions
Is carbon fiber worth it on a Mazda RX-7 FD?
Yes — carbon fiber is worth it on the FD3S because the doors, fenders, and rear hatch are steel from the factory, so swapping them for carbon removes real weight from a car built around a weight-first philosophy. Seibon carbon panels run roughly 30–50% lighter than the steel parts they replace, and lowering weight up high sharpens turn-in on the FD’s near-50/50 chassis.
Does the RX-7 FD have an aluminum hood from the factory?
Yes. The 1993–1995 RX-7 FD3S uses an aluminum hood as part of Mazda’s aggressive weight reduction, which is why a carbon hood saves less on the FD than on a steel-hooded car. On the FD you buy a carbon hood mainly for its venting, heat extraction, and appearance rather than a large weight number.
Do Seibon carbon fiber hoods require hood pins?
Yes. Seibon requires hood pins on all carbon fiber hoods and instructs owners not to reinstall the stock hood springs or struts. A lightweight carbon hood can lift at speed on the factory latch alone, so hood pins are a safety requirement. Seibon also requires a heat shield to protect the underside from engine heat.
How much do carbon fiber body parts cost for the RX-7 FD3S?
At NLP Performance, Seibon carbon fiber panels for the 1993–1995 RX-7 FD3S range from $1,260 for the OEM-style carbon trunk/hatch to $3,420 for the full carbon door pair. The three vented hood styles (TS, ST, KS) are $1,350 each, the 10mm wider fenders are $1,305, and the interior carbon door panels are $1,620.
What is the difference between Seibon TS, ST, and KS hoods?
All three are vented carbon hoods for the FD3S priced at $1,350. The TS style is the most aggressive with functional venting for heat extraction, the ST style is a cleaner lower-key vented look, and the KS style uses its own distinct vent layout. Since they cost the same, the choice comes down to the look and airflow you prefer.
Are Seibon carbon panels a direct bolt-on for the FD3S?
Mostly — the doors, hood, hatch, and fenders mount to the factory hinges and mounting points, but carbon panels often need minor hinge and striker adjustment to achieve even gaps, and professional installation is recommended. Always dry-fit and check panel gaps before final torque, and inspect each freight-shipped panel for damage on arrival.
Ready to Take Your RX-7 FD to the Next Level?
Shop Seibon carbon fiber doors, hoods, fenders and more for the FD3S at NLP Performance.
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