Borla 84-91 Chevrolet Corvette C4 5.7L V8 D SQ AC IC Rear Section 2.5 inch Converter

SKU: BOR11376

Exhaust Systems

BOR Axle Back S-Type

Borla

Borla 84-91 Chevrolet Corvette C4 5.7L V8 D SQ AC IC Rear Section 2.5 inch Converter

SKU: BOR11376

Exhaust Systems

BOR Axle Back S-Type

IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

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Description

To complete this installation you will need to MODIFY the Original Equipment (O.E.) Mid-Pipe by expanding the outlets from to 2.25" to 2.5". This system upgrades your '84-'91 Corvette from the stock 2.25" diameter Axle-Back system to a more aggressive 2.5". The system features the classic S-Type sound with no drone inside the vehicle. It has dual BORLA® intercooled style 3.38" x 3" rectangle polished T-304 stainless steel tips on each muffler for a custom appearance. BORLA® Cat-Back™ & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA® stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Product Overview

Axle-Back system 11376 converts your '84-'91 Corvette from the stock 2.25" system to a more aggressive, 2.5" system. Features polished T-304 stainless steel tips. To complete this conversion you will need to order a Y-Pipe assembly, either a #60001 for the '84-'85 or the #60002 for '86-'91. BORLA(r) Cat-Back(tm) & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, BORLA(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Product Details

Construction:	All Welded
Description:	S-Type; Rear Section Exhaust
Exhaust Type:	Axle-Back System
Exit Position:	Dual Split Rear
Exit Style:	Dual Split Rear Exit
Grade Type:	Performance
Inlet Inside Diameter:	2.500 in.
Inlet Size (in.):	2.5
Material:	T-304 Stainless Steel
Muffler Type:	Straight-Through
Off Road Use Only:	No
Outlet Outside Diameter:	2.500 in.
Outlet Size (in.):	2.5
Part Number:	bor11376
Prop 65 (C, R or CR):	CR
Prop 65 - Long Label:	WARNING: This product in the physical form it is sold does not present a hazard. However, operations including, but not limited to welding, brazing, or thermal cutting can expose you to chemicals including Chromium, Nickel, Cobalt, Arsenic, Cadmium and Lead which are known to the State Of California to cause cancer, birth defects and other reproductive harm. For more information go towww.P65Warnings.ca.gov
Prop 65 - Short Label:	Proposition 65 Warning.JPG
Prop 65 Yes/No:	Yes
System Type:	Axle Back
Tail Pipe Diameter:	2.500 in.
Tail Pipe Material:	Stainless Steel
Tip / Outlet Finish:	Polished T-304 Stainless Steel
Tip Diameter:	3.800 in.
Tip Size:	3.8in
Title Extended:	C4 Corvette 1984-1991 Axle-Back Exhaust System S-Type Part # 11376
Title:	C4 Corvette 1984-1991 Axle-Back Exhaust System S-Type
Tubing Diameter:	2.500 in.

Application Summary

1984-1991 Chevrolet Corvette (C4) 5.7L V8 Automatic/ Manual Transmission Rear Wheel Drive Coupe/ Convertible. Modification To Original Equipment Mid-Pipe REQUIRED.

Part Type

Exhaust System Kit

Data: v4.2 - Upd: 2026-10-11 13:51:49

Features

This system increases the Axle-Back section diameter from the stock 2.25", to 2.5"

Specifications

Product Attributes - UPC: 808422113762
Product Attributes - Brand: Borla
Product Attributes - Notes: Conversion "Y" pipe required.
Product Attributes - Tip Cut: Slant intercooled
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Part Type: Exhaust Systems
Product Attributes - Tip Shape: Square
Product Attributes - Tip Finish: Polished
Product Attributes - Exhaust Type: Dual in/Four out
Product Attributes - Product Line: Borla S-Type Axle-Back Exhaust Systems
Product Attributes - System Style: Rear section
Product Attributes - Tip Included: Yes
Product Attributes - Tip Material: 304 stainless steel
Product Attributes - Tip Quantity: 4
Product Attributes - Exit Location: Split rear
Product Attributes - Muffler Style: Turbo
Product Attributes - System Finish: Natural
Product Attributes - Inlet Quantity: 2
Product Attributes - Muffler Finish: Natural
Product Attributes - Tip Edge Style: Non-rolled edge, single-wall
Product Attributes - System Material: 304 stainless steel
Product Attributes - Muffler Included: Yes
Product Attributes - Muffler Material: 304 stainless steel
Product Attributes - Muffler Quantity: Two
Product Attributes - Hardware Included: Yes
Product Attributes - Special Attention: It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.
Product Attributes - Muffler Configuration: Single inlet/Dual outlet
Product Attributes - Tip Outlet Size (in.): 3.80 x 3.00
Product Attributes - Tailpipe Diameter (in.): 2.50 in.
Product Attributes - Manufacturer's Part Number: 11376
Product Attributes - Catalytic Converter(s) Included: No
Product Attributes - Intermediate Pipe Diameter (in.): 2.50 in.

Reference Information

Brand Name/s	Borla
StreetFX SKU	bor11376
SFX Item ID	4224906
Supplier Item Code	4224906
Manufacturer SKU	11376
Manufacturer UPC	808422113762
Alternative References	5.7L

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Compatibility

1984-1991 Chevrolet Corvette (C4) 5.7L V8 Automatic/ Manual Transmission Rear Wheel Drive Coupe/ Convertible. Modification To Original Equipment Mid-Pipe REQUIRED.

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