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Catco 9171 Catalytic Converter

Brand	Catco 9171
Body Material	Stainless steel
Inlet Gasket	Yes
Inlet Hardware	No
Inlet Type A	3 bolt loose flange w/ flare
O2 Sensor Ports	1
Outlet Gasket	Yes
Outlet Hardware	No
Outlet Type A	2 bolt welded flange
Overall Length (IN)	48.13
Substrate Material	Ceramic
Type	Federal / epa direct-fit
Fits	Buick, Chevrolet, GMC, Isuzu, and Saab · 14 vehicles

Direct-fit design. Built to exact OE dimensions for straightforward installation.

Ceramic substrate. Proprietary chemistry helps deliver efficient converter performance.

Stainless steel body. Corrosion-resistant construction for lasting exhaust durability.

$35.29Free shipping

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Direct-Fit Catalytic Converter for GM SUVs

Catco 9171 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It uses a ceramic substrate inside a stainless steel body to support efficient exhaust flow and emissions control on select 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, and Saab 9-7x applications.

With integrated inlet and outlet gaskets, one O2 sensor port, and flange-style connections, this converter is built for a straightforward exhaust replacement on the listed vehicles. Catco 9171 is a practical choice when you need a direct-fit catalytic converter for 2006-2007 Buick Rainier or 2006-2007 Chevrolet Trailblazer exhaust service.

Key Features

Federal / EPA direct-fit catalytic converter
Stainless steel body for exhaust system durability
Ceramic substrate material
One O2 sensor port
Inlet gasket included; outlet gasket included
3-bolt loose flange with flare inlet design
2-bolt welded flange outlet design
Overall length: 48.13 in.

Detailed Description

Catco 9171 is engineered for direct replacement on the specified GM platform vehicles, including the Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, and Saab 9-7x. The converter is manufactured to OE dimensions for proper alignment with the exhaust system, while Catco’s production process uses automated workstations, spinner welding equipment, and high-speed manufacturing lines to maintain consistent fitment and build quality. The ceramic substrate is paired with a stainless steel shell to support emissions performance and long-term exhaust service.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

Failed catalytic converter efficiency codes
Exhaust restriction from a deteriorated substrate
Rattling or damaged converter internals
Exhaust leaks at flange connection points
Emissions test failures on the listed vehicles

Installation Notes and Tips

Verify the vehicle’s emissions configuration before ordering. This Federal / EPA direct-fit converter is listed for 2006-2007 Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, and Saab 9-7x applications, with notes indicating Federal and California emissions coverage for the listed fitments. It is not for sale or use on vehicles licensed in CA, CO, ME, or NY; check local regulations for additional restrictions. Confirm the inlet and outlet flange style, O2 sensor port location, and overall exhaust routing before installation.

Quality Assurance

Catco builds this converter to OE dimensions using controlled manufacturing processes and proprietary substrate chemistry aimed at efficient converter loading and consistent performance. The result is a direct-fit emissions component designed for accurate fitment on the specified applications.

This part fits 14 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Liters	Cylinders	Wheel Base	Position	Notes
2007	Buick	Rainier	—	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	Chevrolet	Trailblazer	LS	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	Chevrolet	Trailblazer	LT	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	GMC	Envoy	SLT	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	GMC	Envoy	SLE	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	Isuzu	Ascender	—	4.2L	L6	113.0"	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2007	Saab	9-7x	—	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	Buick	Rainier	—	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	Chevrolet	Trailblazer	LT	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	Chevrolet	Trailblazer	LS	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	GMC	Envoy	SLE	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	GMC	Envoy	SLT	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	Isuzu	Ascender	—	4.2L	L6	113.0"	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2006	Saab	9-7x	—	4.2L	L6	—	N/A	Direct Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
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