Sports Series 4.5" High Flow Catted Downpipe for the INEOS Grenadier B58 (6 Cylinder) Engine

$945.00

Shipping calculated at checkout.

Finish

Brush Finish

Polish Finish

Ceramic Thermal Coating

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Inventory on the way

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SPORTS SERIES 4.5" HIGH-FLOW CATTED DOWNPIPE

Name: Sports Series 4.5" High Flow Catted Downpipe for the INEOS Grenadier B58 (6 Cylinder) Engine
Brand: Overland Xtreme
SKU: BM-EXH018SCAT
Price: 945.0 USD
Availability: InStock

INEOS Grenadier • B58 6-Cylinder Turbo

Built in the USA. Engineered for Maximum Flow.

Unlock the B58 with a 4.5" high-flow catted downpipe designed specifically for the INEOS Grenadier. The larger 4.5" inlet matches the B58 turbo outlet for a smooth, unrestricted transition—reducing turbulence and backpressure while improving turbo spool, throttle response, and power potential.

WHY SPORTS SERIES?

4.5" → 4" mandrel-bent piping for optimized exhaust flow
200-cell metallic high-flow catalytic converter
100% 304 stainless steel
100% TIG welded in-house
CNC-machined billet V-band flange
Smooth transitions designed to minimize turbulence
Integrated stainless flex section for long-term durability
Fits factory or aftermarket exhaust systems
Track-tested durability
Includes all installation hardware
Limited Lifetime Warranty
Brushed finish standard • Polished finish available

PERFORMANCE

The factory catalytic converter creates significant exhaust restriction. Our 200-cell metallic core provides substantially more flow while maintaining a high-flow catalytic converter design.

The result:

Faster Turbo Spool • Better Throttle Response • Reduced Backpressure • Increased Power Potential

OPTIONAL UPGRADES

🔥 Ceramic Thermal Coating
Up to 2000°F heat resistance. Helps retain exhaust heat, reduce underhood temperatures, improve exhaust velocity, and add corrosion protection.

📡 Additional O₂ Sensor Bung
Pre-installed and plugged for easy future wideband installation.

🌡️ EGT Sensor Bung
Pre-installed 1/8" NPT bung for an EGT sensor and gauge.

BUILT FOR THE B58

The B58's 4.5" turbo outlet deserves a downpipe designed around it. Rather than creating a restrictive step-down at the turbo, the Sports Series uses a precision-machined 4.5" flange and smooth transition to maximize exhaust flow where it matters most.

Performance. No Compromise.

Made in the USA • 304 Stainless • TIG Welded • B58 Specific

OFF-ROAD / COMPETITION USE ONLY

Not legal for use on pollution-controlled vehicles operated on public roads or highways. Not available for sale, installation, or use on licensed vehicles in California. Vehicle-use verification and a compliance waiver may be required.

If you’re looking to return or exchange your order for whatever reason, we’re here to help! We offer free returns within 30 days of purchase. You can return your product for store credit, a different product, or a refund to the original payment method. Please Email info@overlandxtreme.com

About our brand

At OX we sell/develop products that are geared towards the offroad enthuisiest

Developed and tested At Altitude

We have the destinct advantage to test everything we sell or develop at altitude right out our backdoor. Located at 6500ft In Eagle CO we have offroad and high mountain playgrounds.

Testimonials

★★★★★
Great results having these guys install a VanCompass 4.3 suspension upgrade on a Storyteller Overland Classic. They have done 50+ suspension upgrades and are knowledgeable and experienced. They keep a lot of components in stock, and offer many van upgrades besides suspension. Their pricing was also great, I drove 2+ hours to use their shop as they gave the best service and pricing when I was calling around.
Tommy Stover
Denver, CO

★★★★★
Got set up with Van Compass and Owl Vans accessories for our sprinter with expert installation. Great local company in the Vail Valley.
Graham Kane
Frisco, CO

★★★★★
Awesome Customer Service. Great Tuning Install on my Storyteller Beast. Now the beast is running better than ever.
Matt
Denver, CO

Sports Series 4.5" High Flow Catted Downpipe for the INEOS Grenadier B58 (6 Cylinder) Engine

SPORTS SERIES 4.5" HIGH-FLOW CATTED DOWNPIPE

INEOS Grenadier • B58 6-Cylinder Turbo

WHY SPORTS SERIES?

PERFORMANCE

OPTIONAL UPGRADES

BUILT FOR THE B58

Testimonials

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Sports Series 4.5" High Flow Catted Downpipe for the INEOS Grenadier B58 (6 Cylinder) Engine

SPORTS SERIES 4.5" HIGH-FLOW CATTED DOWNPIPE

INEOS Grenadier • B58 6-Cylinder Turbo

WHY SPORTS SERIES?

PERFORMANCE

OPTIONAL UPGRADES

BUILT FOR THE B58

Testimonials