Milltek Hi-Flow Sports Cats for Chevrolet/GMC Corvette Stingray (C8) 6.2L V8 & E-Ray Hybrid (Non-OPF/GPF Models) (2020 onwards) – Improved Flow, Sports Catalyst
This is Milltek's large-bore downpipe with hi-flow sports cat for the Chevrolet/GMC Corvette Z06 (C8) 5.5 V8. It replaces the restrictive factory downpipe with a larger-bore pipe fitted with a high-flow sports catalyst in place of the standard unit, using a less dense substrate that flows significantly better than the factory cat while still treating the exhaust gases passing through it. It's offered in HJS HQ 200CPSI cats (no heat wrap) NOTE on 25+ or vehicles with the latest ECU update from the dealer may get a CEL or HJS HQ 200CPSI cats (with heat wrap) NOTE on 25+ or vehicles with the latest ECU update from the dealer may get a CEL versions, so you can pick the setup that suits how the car's used.
It sits between a stock downpipe and a full de-cat: a genuine flow gain suited to a Stage 1 or Stage 2 remap, without giving up the catalyst entirely the way a de-cat pipe does.
In the UK, a replacement catalyst on a car first registered from 1 March 2001 needs ECE R103 type-approval to be road legal, so check the EC Approved line in the specification for the version you choose.
Specifications
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System Type: Hi-Flow Sports Cats
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Pipe Diameter: 76.2mm (3")
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EC Approved: No
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Race System: No
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
- High-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Chevrolet/GMC Corvette Stingray (C8) 6.2L V8 & E-Ray Hybrid (Non-OPF/GPF Models) (2020 onwards)
- Chevrolet/GMC Corvette Z06 (C8) 5.5 V8 (2023 onwards)
Not suitable for: Chevrolet/GMC OPF/GPF models, or any model not listed above.
Installation
This work involves removing parts close to the turbo and engine, so we recommend fitting by a specialist with a ramp and suitable software support.
Upgrade Further
Also available from Milltek for this car: Milltek Cat-back Exhaust Chevrolet & GMC Corvette Stingray C8 6.2L V8 & E-Ray Hybrid Non-OPF/GPF 20+.
Will it fit the Chevrolet/GMC Corvette Z06 (C8) 5.5 V8?
Yes. Milltek lists this part for the Chevrolet/GMC Corvette Z06 (C8) 5.5 V8 as well as the other models in the fitment list above.
Is it road legal?
Milltek does not list EC approval for this part. Any exhaust used on the road must still meet noise and emissions rules, so check the requirements where you live.
Do I need a remap?
A suitable remap is strongly recommended, as the engine management needs to account for the change in flow and sensor readings. Speak to your tuner before fitting.
How is a sports cat different from a de-cat?
A sports cat still contains a catalyst, just a less dense one that flows better than the factory unit. A de-cat removes the catalyst completely.
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.
