Next Level Performance
August 14, 2026 • 9 min read
A Lotus Emira brake upgrade swaps the factory two-piece J-hook discs for lighter, more heat-resistant slotted rotors so the last combustion-engine Lotus can stop as hard on lap twenty as it does on lap one. The 2022-2025 Emira pairs a 400 hp supercharged 3.5L Toyota V6 (or the 360 hp Mercedes-AMG 2.0L turbo four) with a roughly 3,100 lb curb weight, and its 370mm front / 350mm rear rotors work hard on a road course. In this comparison we put the two most popular Emira rotor upgrades head-to-head — GiroDisc two-piece slotted rotors and EBC Racing two-piece SG rotors with SR-21 race pads — with real part numbers, prices, and fitment so you can pick the right setup for the street, the canyon, or the track.
Our Verdict
GiroDisc two-piece slotted rotors are the best all-around Lotus Emira brake upgrade.
GiroDisc offers matched front (370mm) and rear (350mm) two-piece floating rotors with replaceable iron rings, so you cut unsprung and rotating weight now and rebuild for a fraction of a full rotor later. Track-focused drivers chasing the lowest entry price should look hard at the EBC Racing 2-piece front rotor (around $1,070) paired with EBC SR-21 full-race sintered pads.
Shop Our Top Pick →Why the Lotus Emira needs a brake upgrade
The Lotus Emira is fast enough to overwhelm its factory brakes on a hot track day. With 400 horsepower and 317 lb-ft from the supercharged 3.5L V6, a 0-60 mph time near 4.2 seconds, and a top speed around 180 mph, the Emira asks its 370mm front and 350mm rear discs to scrub big speed lap after lap. The factory two-piece J-hook rotors are genuinely good for spirited road driving, but repeated threshold braking heat-soaks the discs and pads, and that is where you feel a longer pedal and fading bite.
Upgrading the rotors and pads targets the two things that actually cause brake fade: heat capacity and pad temperature range. A lighter two-piece rotor sheds unsprung and rotational mass, runs cooler thanks to a floating iron ring that expands independently of its aluminum center hat, and resists the coning and cracking that kill one-piece discs under abuse. Match that rotor with a higher-temperature pad compound and the Emira holds a firm, repeatable pedal deep into a session. At NLP Performance, we treat rotors and pads as one system — the disc manages heat, the pad sets the friction, and both have to survive the same temperatures.
A two-piece floating rotor lets the iron friction ring expand independently of the aluminum hat.
GiroDisc vs EBC Racing: Lotus Emira brakes at a glance
Both upgrades are direct, OE-diameter (370mm front / 350mm rear) two-piece rotors that bolt to the Emira with the factory calipers — no bracket or caliper swap required. The core difference is coverage and cost: GiroDisc sells matched front and rear rotors with replaceable rings for long-term value, while EBC Racing offers a lower-priced front 2-piece rotor designed to run with its own SR-21 sintered race pad for a track-first package. The table below breaks down the four parts most Emira owners actually cross-shop.
| Kit | Type | Position | Rotor / Compound | Price |
|---|---|---|---|---|
| GiroDisc 370mm Slotted Front RotorsTop Pick | 2-piece floating, slotted | Front | 370mm J-slot iron ring, aluminum hat | $1,450.00 |
| GiroDisc 350mm Slotted Rear Rotors | 2-piece floating, slotted | Rear | 350mm J-slot iron ring, aluminum hat | $1,350.00 |
| EBC Racing 2-Piece SG Front Rotors | 2-piece floating, grooved | Front | OE-diameter SG grooved iron ring | $1,070.17 |
| EBC Racing SR-21 Sintered Race Pads | Sintered race pad | Front axle | SR-21 full-race compound | $346.63 |
Both the GiroDisc and EBC rotors are direct OE-diameter bolt-ons for the Emira.
GiroDisc two-piece slotted rotors (front and rear)
GiroDisc rotors are the value pick for a complete Lotus Emira brake refresh because they cover both axles and are built to be rebuilt. Each rotor uses a slotted iron friction ring mounted to a black-anodized aluminum center hat with stainless drive hardware, letting the ring float and expand under heat instead of coning. The front rotor is 370mm and the rear is 350mm — the exact factory diameters — so they run with the stock Emira calipers and your choice of street or track pads.
Key Specifications — GiroDisc Front Rotor
The rebuildable design is the quiet advantage. When the friction rings eventually wear past spec, you replace only the iron rings — the GiroDisc front slotted rings run about $792 and the rear rings about $747 — and keep the expensive aluminum hats and hardware. That turns future brake service into a wear-part purchase rather than a full rotor replacement. GiroDisc also offers matched caliper rebuild kits (about $50 per corner) so you can refresh seals during a big brake service.
What We Like
- + Matched front and rear coverage at OE 370mm / 350mm diameters
- + Two-piece floating design cuts unsprung and rotating mass, runs cooler
- + Replaceable iron rings make future rebuilds far cheaper than new rotors
- + Free shipping and a direct bolt-on with factory calipers
Things to Consider
- – Premium price — a front-and-rear set runs about $2,800 before pads
- – Rings are a wear item you will eventually replace on a hard-driven car
GiroDisc rings are replaceable wear parts, so a rebuild costs far less than a new rotor.
EBC Racing 2-piece SG rotors and SR-21 race pads
EBC Racing is the track-first, lower-entry option for the front axle. The EBC 2-Piece SG front rotor uses a grooved iron ring on a lightweight black aluminum bell and, at about $1,070, undercuts the front GiroDisc by roughly $380. It is designed to run with EBC racing pad compounds, and the natural partner is the SR-21 sintered race pad — a full-race friction material built for the extreme temperatures of repeated track sessions rather than cold street stops.
The SR-21 compound is a sintered, full-race pad with a very high operating-temperature window, which is exactly what you want for back-to-back hot laps. The trade-off is street manners: full-race sintered pads take heat to reach peak friction, can be noisy and dusty cold, and are harder on rotor faces than a street compound. For a dedicated track car or an Emira that sees frequent HPDE days, the EBC front rotor plus SR-21 pad is a focused, cost-effective front-brake package. For a street-and-occasional-track Emira, we usually pair a two-piece rotor with a dual-purpose pad instead.
What We Like
- + Lowest entry price for a two-piece front rotor (about $1,070)
- + Purpose-built to run with EBC SR-21 full-race sintered pads
- + Grooved disc face keeps bite consistent and de-gasses the pad
Things to Consider
- – This listing covers the front axle only — no matched 2-piece rear
- – SR-21 is a full-race compound with poor cold and street behavior
SR-21 is a full-race sintered compound built for repeated high-temperature track braking.
Which Lotus Emira brake upgrade is right for you?
Choose GiroDisc if you want one system that covers both axles and pays you back over time. The matched 370mm front and 350mm rear rotors keep the car balanced, the floating two-piece design manages heat, and the replaceable rings mean your next brake service is a ring swap rather than a full rotor bill. It is the setup we recommend for the widest range of Emira owners, from aggressive street drivers to regular track-day regulars.
Choose the EBC Racing front rotor and SR-21 pad if your priority is maximum front-axle track performance at the lowest cost of entry, and you are willing to accept full-race pad manners on the street. Many owners start here on the front axle and add rear rotors and a dual-purpose pad later. Whichever way you go, bed the pads and rotors properly on the first drive, and pair any two-piece rotor with fresh high-temperature brake fluid and, ideally, stainless brake lines to get the firmest pedal from your new Lotus Emira brakes. Not sure which pad compound fits your driving? Our Tampa, FL team can spec a full setup from our brake collection.
Both upgrades bolt to the factory Emira calipers at OE 370mm front / 350mm rear diameters.
Frequently Asked Questions
Are the Lotus Emira's factory brakes good enough for track days?
The Emira's factory 370mm front and 350mm rear two-piece J-hook discs are strong for road and canyon driving, but they heat-soak and fade during repeated hard track laps. For frequent track use, upgrade to lighter two-piece rotors and a higher-temperature pad so the brakes hold a firm, repeatable pedal through a full session.
What size are the Lotus Emira's brake rotors?
The 2022-2025 Lotus Emira uses 370mm front and 350mm rear brake rotors from the factory. GiroDisc and EBC Racing replacement rotors match those exact diameters, so they bolt on with the stock calipers and require no bracket or caliper change.
Do GiroDisc rotors fit the Emira with the factory calipers?
Yes. GiroDisc 370mm front and 350mm rear rotors are direct OE-diameter replacements that use the factory Lotus Emira calipers and standard pads. The two-piece floating design simply swaps in where the one-piece factory disc came out.
GiroDisc vs EBC Racing rotors for the Emira — which is better?
GiroDisc is the better all-around choice: it covers front and rear (about $1,350-$1,450 per axle) and uses replaceable rings that make rebuilds cheaper. EBC Racing is the better value on the front axle alone (about $1,070) and is built to run with EBC SR-21 full-race pads for a track-first setup.
Will slotted brake rotors wear out my pads faster?
Slotted rotors shave a very thin layer off the pad each rotation, so pad life drops slightly compared with a plain-faced disc. In exchange, the slots clear gas and debris and keep bite consistent as temperatures climb, which is why track-focused Emira owners accept the small pad-life trade for better fade resistance.
How much does a full Lotus Emira brake upgrade cost?
A complete GiroDisc rotor set runs about $2,800 for front and rear combined. Adding EBC SR-21 front race pads is about $347, and replacement GiroDisc rings later cost roughly $747-$792 per axle instead of buying whole new rotors.
Does upgrading the brakes void the Lotus Emira warranty?
Installing aftermarket brake rotors or pads does not automatically void your factory warranty under the Magnuson-Moss Warranty Act. A manufacturer can only deny a specific claim if it proves the aftermarket part caused that failure, so quality brake components installed correctly are low-risk.
Upgrade Your Lotus Emira Brakes
Shop GiroDisc and EBC Racing rotors, race pads, and rebuild kits — plus thousands more performance parts at NLP Performance.
Shop the Brake CollectionFree shipping on select brands • Located in Tampa, FL