Milltek Primary Cat-back Exhaust for Toyota/Lexus Corolla GR Corolla 1.6 Turbo (Manual Only) (2023 onwards) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the Toyota/Lexus Corolla GR Corolla 1.6 Turbo (Manual Only). It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in non-resonated or resonated versions and 4 tailpipe finishes, so you can pick the setup that suits how the car's used.
It's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.
Specifications
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System Type: Primary Cat-back
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Pipe Diameter: 76.2mm (3")
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Tip Style: 115mm GT115
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EC Approved: No
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Race System: Yes
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Fitting Time: approx. 0 to 1 hours (Milltek figure)
Key Features
- Made from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration
- Mandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow
- 76.2mm (3") pipework
- Replaces the standard exhaust from the catalytic converter back, so the factory cat is retained
- Choice of 4 tailpipe finishes: GT-115 Brushed Titanium, GT-115 Burnt Titanium, GT-115 Cerakote Black, GT-115 Polished
- Resonated (quieter) or non-resonated (louder) versions
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Toyota/Lexus Corolla GR Corolla 1.6 Turbo (Manual Only) (2023 onwards)
Not suitable for: the Toyota/Lexus GX GX550 3.4 Turbo V6, which needs the Milltek Cat-back Exhaust Toyota Lexus GX GX550 3.4 Turbo V6 24+; the Toyota/Lexus Land Cruiser 2.4L Turbo Hybrid (NAS Models), which needs the Milltek Cat-back Exhaust Toyota Lexus Land Cruiser 2.4L Turbo Hybrid NAS 24+; the Toyota/Lexus Yaris Gen 1 - GR & GR Circuit Pack 1.6T (OPF/GPF Models Only), which needs the Milltek Toyota & Lexus Yaris Gen 1 GR & GR Circuit Pack 1.6T OPF/GPF Only 20-24.
Installation
Milltek quotes a fitting time of approx. 0 to 1 hours. Some versions: 76.2mm/3' Non Resonated Primary Cat Back (Loudest) with Brushed Titanium GT Tips - Re-uses OE Valve Controls, Bypasses the Secondary Cat & No Cutting of the OE System Required. Some versions: 76.2mm/3' Non Resonated Primary Cat Back (Loudest) with Burnt/Blue Titanium GT Tips - Re-uses OE Valve Controls, Bypasses the Secondary Cat & No Cutting of the OE System Required. Some versions: 76.2mm/3' Non Resonated Primary Cat Back (Loudest) with Cerakote Black GT Tips - Re-uses OE Valve Controls, Bypasses the Secondary Cat & No Cutting of the OE System Required. Some versions: 76.2mm/3' Non Resonated Primary Cat Back (Loudest) with Polished GT Tips - Re-uses OE Valve Controls, Bypasses the Secondary Cat & No Cutting of the OE System Required. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.
Upgrade Further
Also available from Milltek for this car: Milltek Active Valve Control Toyota Lexus Corolla GR Corolla 1.6 Turbo Manual 23+, Milltek Downpipe & Sports Cat Toyota Lexus Corolla GR Corolla 1.6 Turbo Manual 23+.
What's the difference between the resonated and non-resonated versions?
The resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive.
Which tailpipe finishes are available?
You can choose from: GT-115 Brushed Titanium, GT-115 Burnt Titanium, GT-115 Cerakote Black, GT-115 Polished. The finish is cosmetic and does not change the sound.
Does it fit the Toyota/Lexus GX GX550 3.4 Turbo V6?
No. For that car, choose the Milltek Cat-back Exhaust Toyota Lexus GX GX550 3.4 Turbo V6 24+.
Is it road legal?
Milltek lists this as a race part without EC approval, so it is intended for off-road and competition use.
Do I need a remap?
No. It fits behind the factory catalytic converter, so no software changes are needed.
Does it keep the factory catalytic converter?
Yes. It fits behind the factory catalytic converter, which stays in place.
How long does it take to fit?
Milltek quotes approx. 0 to 1 hours.
What is it made from?
T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.
Is there a warranty?
Yes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.
