MO
Milltek Hi-Flow Sports Cat | Performance Catalyst
SKU: SSXMTK002
Description
The Milltek Hi-Flow Sports Catalyst is a high-flow replacement for restrictive OEM catalytic converters. Engineered to reduce backpressure and improve exhaust scavenging while maintaining emissions compliance, this T304L stainless steel component is designed for performance applications where Stage 2+ ECU remapping is planned.
Construction & Fitment: Mandrel-bent T304L stainless steel core with precision catalyst substrate. Direct OEM bolt-on fitment using factory hangers and mounting points—no modification required. Requires Stage 2 or higher ECU calibration to unlock full performance potential and avoid fault codes.
Performance & Sound Character: Reduces catalytic restriction by up to 40% versus OE units, allowing downstream exhaust components to flow freely. Works seamlessly with Milltek cat-back and turbo-back systems to optimize system resonance and tone.
Direct factory fitment eliminates guesswork—know exactly what you're installing.
- T304L stainless steel construction
- Mandrel-bent for optimal flow
- OEM-compatible hangers and flanges
- Stage 2+ ECU remap required
- Tested for durability and emissions compliance
Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.
Key Facts
| Pipe Diameter | 63.50 |
| 0 hours to fit (including removing OE system) | |
| Race Product | Yes |
| EMarked | No |
Shipping Information
This system ships in 1 box.
Best Sellers

Milltek Race 80mm Cat-Back Exhaust | VW Golf MK8 GTI
SSXVW681MP
Total
$1448.78
$1448.78

Milltek HJS Hi-Flow Sports Cat (w/ Heat Wrap) | Chevrolet C8 Corvette Z06
SSXCH111
Total
$3321.28
$3321.28
MO

Milltek Secondary Catalyst Bypass (Fits to OE System Only) | Porsche Cayenne 958 Turbo 4.8 V8 (Pre-Facelift)
SSXPO182
Total
$492.20
$492.20

Forge Intake Kit | 2025+ Ford Maverick and Bronco Sport 2.0T EcoBoost
FMINDK65-PLE
Total
$335.98
$335.98

Milltek Secondary Catalyst Bypass Exhaust | Ford Maverick 2.0T AWD
SSXFD547MP
Total
$202.98
$202.98

Milltek Secondary Catalyst Bypass (Fits to OE System Only) | Porsche 958 Cayenne S 4.8 V8 (Non-Turbo)
SSXPO204
Total
$492.20
$492.20

Milltek Valved Axle-Back Exhaust | Dodge Charger Sixpack H/O 3.0T Hurricane
ENQ-CHG-ABV-MP
Total
$1845.32
$1845.32
MO

Milltek Secondary Catalyst Bypass | Audi RS3 8V Dual Catalyst Systems
SSXAU588
Total
$330.63
$330.63
MO

Milltek Large Bore Downpipe with HJS Hi-Flow Cat - NO CEL | VW Golf MK8 R
SSXVW672MP
Total
$1837.19
$1837.19

Milltek Cat-Back Exhaust | Dodge RAM 1500 Rebel
SSXRAM109MP
Total
$1937.77
$1937.77
