McLaren 570S, 600LT and 720S Downpipes vs Race Exhaust: Fitment, Sound, CEL Risk and Upgrade Order

Start with fitment before choosing sound

McLaren exhaust shopping gets confusing fast because the names sound close, but the parts do not all cross over. A 570S, 570GT, 540C, 600LT and 675LT sit in a different fitment conversation than a 720S or 765LT. The McLaren GT/GTS family is separate again.

That matters before you compare sound clips, titanium options, catless downpipes, catted downpipes or race exhaust layouts. The wrong assumption can lead to a part that looks similar online but does not match your model year, engine family, flanges, sensors, valves or rear-section layout.

This guide keeps the decision in the right order:

1. Identify the McLaren family.
2. Confirm the exact product fitment.
3. Decide whether your first upgrade should be downpipes, a race exhaust, or both together.
4. Plan tuning, CEL/readiness expectations and race-use limitations before install day.

For current AZ Motorsport options, start with the full McLaren performance exhausts and downpipes collection, then narrow to McLaren downpipes or McLaren exhaust systems.

Quick fitment table: Sport Series, Super Series and GT/GTS

Use this table as a starting point, not a substitute for checking your VIN/model year and product page before ordering.

The main takeaway: “McLaren downpipe” is not specific enough. Search and order by platform, model year and product fitment, not by brand name alone.

Downpipes vs race exhaust: what changes first?

A downpipe and a race exhaust both change the exhaust system, but they affect different parts of the car.

A downpipe sits upstream near the turbochargers and changes the high-pressure section after the turbine. On the AZM McLaren downpipe products, the available configurations include Race (Catless) and High Flow (Catted) variants, with optional heat shielding selections. The listed construction includes 304 stainless steel, TIG welding, CNC-machined flanges or cast inlets, and bolt-on replacement using OEM mounting points on the relevant product pages.

A race exhaust or catback/rear section sits farther back. It is usually the more direct “sound personality” part because it changes the muffler/rear-section layout, valve strategy and material choice. The AZM 570S/570GT/540C and 720S race exhaust systems list T304 stainless steel or Grade 5 titanium options, plus straight-pipe race or remote-controlled valved variants depending on configuration.

Sound

If your main goal is a sharper, more emotional exhaust note without immediately changing catalyst strategy, the race exhaust is usually the cleaner first conversation. A valved system also gives you more control: quieter when closed, more aggressive when open.

Downpipes can make the car louder and more raw, especially in catless race configuration, but they also bring more tuning and diagnostic considerations. If you are sensitive to smell, cold-start behavior, cabin volume or emissions-readiness issues, do not choose downpipes based only on a short sound clip.

Flow and response

Downpipes target the restrictive area close to the turbochargers. The AZM product pages describe optimized internal design, reduced backpressure and improved exhaust flow, but this guide will not claim a guaranteed horsepower number. Actual results depend on the car, fuel, tune, supporting hardware, dyno method and installation quality.

A race exhaust can also improve flow and response by simplifying the rear section, but it is not the same kind of turbo-side change as a downpipe.

Weight and material

Material choice matters most on the rear exhaust side because that is where stainless steel versus titanium options are listed. AZM’s 570S/570GT/540C and 720S race exhaust products offer T304 stainless steel or Grade 5 titanium configurations. Titanium is generally chosen when the buyer wants a lighter, premium setup; stainless is a strong choice for durability and value.

For downpipes, the listed AZM McLaren products use 304 stainless steel construction.

Heat

Downpipes live in a high-heat area. Both AZM McLaren downpipe products expose optional heat shielding selections. If your car sees track use, repeated pulls or extended high-load driving, discuss heat management with your installer before ordering instead of treating it as an afterthought.

CEL, tune and readiness implications

This is where downpipes and race exhausts differ most.

A rear race exhaust generally has fewer catalyst-monitoring implications than changing the downpipes. Catless or high-flow downpipes can affect oxygen-sensor readings, catalyst monitoring and readiness behavior. Some cars may need calibration support. Some setups may trigger a check engine light. No responsible seller or installer should promise universal no-CEL behavior across every McLaren, tune and market.

If you are planning downpipes, read AZM’s Stage 2 Tuning Checklist for downpipe buyers before ordering. If you are still comparing Stage 1 and Stage 2, start with the Stage 1 vs Stage 2 tuning guide.

Which upgrade should come first?

There is no single correct order. The right sequence depends on your goal.

Choose the race exhaust first if sound control is the priority

Start with a race exhaust when you want a clear sound change, material upgrade and optional valve control without immediately stepping into downpipe-related CEL/readiness planning.

For 570S, 570GT and 540C buyers, the relevant AZM rear-section option is the McLaren 570S/570GT/540C Race Exhaust System. For 720S buyers, the relevant option is the McLaren 720S Race Exhaust System.

This route makes sense when:

• you want the car to sound more aggressive;
• you want a stainless or titanium rear-section choice;
• you prefer a valved configuration for more control;
• you are not ready to plan tuning, sensor strategy or readiness checks yet.

Choose downpipes first if the build is already heading toward Stage 2

Start with downpipes when the car is being built around flow, tuning and higher-output goals. This is usually the more technical path. It should involve your tuner and installer before parts are ordered.

For 570S, 570GT, 540C, 600LT and 675LT fitment, review the McLaren 570S/600LT/675LT Downpipes. For 720S and 765LT fitment, review the McLaren 720S/765LT Downpipes.

This route makes sense when:

• you already have a tuner involved;
• you understand catless versus high-flow catted trade-offs;
• you are planning for possible CEL/readiness behavior;
• you want to address the turbo-side restriction first;
• the car is primarily a race, track or closed-course build.

Choose both together if labor planning and calibration are already sorted

Downpipes plus exhaust can be the cleanest plan for a complete build, but only when the details are already organized. You should know the exact model year, the target sound level, the tuning plan, the heat-management plan and the intended use of the vehicle.

Doing both together can reduce repeat labor and avoid mismatched expectations. It can also make the car dramatically louder and more sensitive to tuning/readiness details, especially with catless race downpipes. If the car is still used on public roads in Québec or elsewhere in Canada, discuss legal and inspection considerations before you commit.

Product mapping: what to click before ordering

McLaren 570S, 570GT, 540C, 600LT and 675LT downpipes

Use the McLaren 570S/600LT/675LT Downpipes page when you are shopping downpipes for the 3.8L family listed on that product page. It includes Race (Catless) and High Flow (Catted) configurations, with optional heat shielding.

Important: the downpipe page covers more models than the 570S rear exhaust page. Do not use downpipe fitment to assume rear-exhaust fitment.

McLaren 570S, 570GT and 540C race exhaust

Use the McLaren 570S/570GT/540C Race Exhaust System page when you are shopping the rear race exhaust for the 570S, 570GT or 540C. The product page lists straight-pipe race and remote-controlled valved options, with stainless steel or Grade 5 titanium material choices.

If you own a 600LT or 675LT, ask for fitment confirmation instead of assuming this rear section applies.

McLaren 720S and 765LT downpipes

Use the McLaren 720S/765LT Downpipes page for the 720S and 765LT fitments listed there. The product page also states that these downpipes are not compatible with 750S 2024+.

If you are researching newer Super Series models, read the related McLaren 765LT and 750S exhaust buyer guide instead of treating this article as a 750S fitment guide.

McLaren 720S race exhaust

Use the McLaren 720S Race Exhaust System page when you are shopping a rear exhaust for a 2017–2023 720S. The active product page lists the 720S, not every related McLaren model.

Install, tuning and CEL checklist

Before ordering McLaren downpipes or a race exhaust, confirm these points:

• Exact model: 540C, 570S, 570GT, 600LT, 675LT, 720S, 765LT, GT, GTS or 750S.
• Exact model year and body style: coupe/spider and year range can matter.
• Product family: do not mix Sport Series, 720S/765LT and GT/GTS assumptions.
• Downpipe type: Race (Catless) versus High Flow (Catted), if both are offered for your application.
• Heat shielding: decide before ordering, not during installation.
• Rear exhaust configuration: straight-pipe race or valved, where available.
• Material: stainless steel versus titanium, where available.
• Valve compatibility: confirm whether your selected exhaust variant uses remote-controlled valves or a fixed straight-pipe layout.
• Tune plan: ask whether your ECU calibration supports your downpipe choice.
• CEL/readiness expectations: no universal no-CEL guarantee; plan diagnostics and post-install checks.
• Gaskets, hardware and install supplies: verify what is included with your selected variant and what your installer prefers to replace.
• Intended use: street, show, track, race or closed-course use changes the right recommendation.

Québec and Canada caveats: race-use wording matters

AZ Motorsport builds McLaren exhaust and downpipe options in Québec, and the McLaren collection pages highlight manufacturer-direct Canadian buying with no customs fees in Canada. That is a real advantage for Canadian buyers comparing imported exhaust parts.

Legal use is a separate question. Catless race downpipes, straight-pipe race exhausts and other competition-oriented configurations may not be appropriate for public-road use depending on the setup and the jurisdiction. Québec buyers should treat SAAQ modified-vehicle guidance, inspection expectations, emissions/readiness behavior and local noise enforcement as part of the purchase decision.

This article is not legal advice. If the vehicle will be driven on public roads, confirm the rules and inspection requirements before installing race-use hardware. If the vehicle is a track or closed-course build, document that use clearly with your installer and tuner.

FAQ

Which McLaren downpipe fits a 570S, 570GT, 540C, 600LT or 675LT?

For AZM, start with the McLaren 570S/600LT/675LT Downpipes product page. It lists 540C, 570S, 570GT, 600LT Coupe/Spider and 675LT fitments, along with other related 3.8L McLaren applications. Confirm your model year and body style before ordering.

Is a 720S downpipe the same as a 765LT downpipe?

The active AZM McLaren 720S/765LT Downpipes product page lists both 720S and 765LT fitments. That does not mean every 720S exhaust part fits every 765LT, and it does not cover 750S 2024+. Use the downpipe product page for downpipe fitment and confirm any rear exhaust separately.

What is louder first: downpipes or a race exhaust on a McLaren?

If the goal is an obvious sound change with more control, a race exhaust is usually the better first step, especially in a valved configuration. Downpipes can also increase volume and rawness, but they bring more tuning, catalyst-monitoring and readiness considerations, especially in catless race form.

Will catless downpipes trigger a CEL on a McLaren 570S, 600LT or 720S?

They can. CEL behavior depends on the vehicle, catalyst monitoring, oxygen-sensor strategy, tune and downpipe configuration. Do not buy catless downpipes expecting a universal no-CEL result. Plan the tune, diagnostics and readiness expectations with your installer before installation.

Do McLaren downpipes require tuning?

A tune is not something to guess about after the parts are installed. If you are installing catless or high-flow downpipes, involve your tuner before ordering and read the Stage 2 downpipe checklist. The right answer depends on your hardware, calibration and intended use.

Should I install downpipes before a race exhaust, or the race exhaust first?

Choose the race exhaust first if your main goal is sound, material choice and valve control. Choose downpipes first if the car is already heading toward a tuned Stage 2-style build and you have CEL/readiness planning handled. Do both together only when fitment, labor, heat management and tuning are already organized.

Is a McLaren race exhaust or catless downpipe legal for street use in Québec or Canada?

Do not assume street legality. Catless race downpipes and straight-pipe race configurations may be intended for race, track or closed-course use depending on the setup. Québec buyers should review SAAQ modified-vehicle guidance and speak with their installer about inspection, noise and readiness expectations. This is not legal advice.

What should I check before ordering McLaren downpipes or an exhaust?

Check model, year, body style, product family, flanges, downpipe type, heat shielding, valve configuration, material, tune support, CEL/readiness expectations and intended use. If any detail is uncertain, contact AZ Motorsport before ordering instead of assuming interchangeability across 570S, 600LT, 675LT, 720S, 765LT, GT/GTS or 750S.

Bottom line

For a 570S, 570GT, 540C, 600LT or 675LT, start with the Sport Series/3.8L downpipe fitment and verify whether you are buying downpipes or a rear exhaust. For a 720S or 765LT, use the 720S/765LT downpipe product page but verify rear exhaust fitment separately. For GT/GTS or 750S questions, do not force-fit the older product family; use the correct platform guide or contact AZ Motorsport.

Fitment first, sound second, tuning and legal use before install day. That order prevents most expensive McLaren exhaust mistakes.