Will this work on a 2001 Silverado 2500hd 8.1L that already has a borla exhaust

Nope, the exhaust cfm of a 496 needs 3" duals to have less back pressure.

I would assume so, if the pipes were the same size and there was enough room for the muffler. I would suggest contacting Borla

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BORLA 400286 ProXS Universal Perf. Muffler 2.5" Dual Inlet / 2.5" Dual Outlet" x 9.5" Oval x 19" Long Body 24" Overall Length Reversible Design Onternal X-Pipe T-304 Stainless Steel

Product ID: 717308

Details

Brand
Borla
Configuration
Dual/Dual
Item Weight
12 pounds
Material
Stainless
Vehicle Service Type
Car

🔄Reversible Design Flexibility

🔥Max Flow Performance Boost

🛠️T-304 Stainless Steel Durability

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Description

🔥 Unleash your engine’s roar with Borla’s ProXS – where power meets precision! 🏁

MADE IN THE USA - Proudly manufactured stateside with all-welded construction for premium quality and reliability.
POWER OPTIMIZED FLOW - Engineered with an internal X-pipe to maximize exhaust flow, unlocking horsepower and torque gains.
UNIVERSAL WELD ON FIT - Un-notched necks designed for seamless weld-in installation, ensuring a secure, custom fit.
DUAL INLET OUTLET DESIGN - 2.5" dual inlet and outlet configuration for superior exhaust scavenging and aggressive sound.
RACE READY STAINLESS STEEL - Crafted from premium T-304 stainless steel for unmatched corrosion resistance and longevity.

The BORLA 400286 ProXS Universal Performance Muffler features a durable T-304 stainless steel build with a reversible 2.5" dual inlet/outlet design and internal X-pipe for maximum exhaust flow. Designed for weld-on installation, this 24" overall length muffler delivers enhanced horsepower and torque, making it ideal for street performance enthusiasts seeking reliable, American-made quality.

Specifications

ASIN	B003D4OMLI
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#312,611 in Automotive ( See Top 100 in Automotive ) #308 in Automotive Replacement Exhaust Mufflers
Brand Name	Borla
Compatible with Vehicle Type	Car
Configuration	Dual/Dual
Customer Reviews	4.4 4.4 out of 5 stars (330)
Global Trade Identification Number	00808422002868
Included Components	Muffler
Item Type Name	Muffler
Item Weight	12 pounds
Manufacturer	BORLA
Manufacturer Part Number	400286
Manufacturer Warranty Description	Manufacturer warranty
Material Type	Stainless Steel
Model Number	400286
Number of Items	1
OEM Equivalent Part Number	400286
Shape	Rectangular
UPC	808422002868

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2680.18 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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