Borla S-Type Axle-Back Exhaust System (11376) - 1984-1991 Chevrolet Corvette C4 5.7L V8
Wake up the classic sound and performance of your early-generation S197-era C4 with the Borla S-Type Axle-Back Exhaust System. Custom-engineered specifically for the 1984 to 1991 Chevrolet Corvette 5.7L V8, this premium upgrade replaces your restrictive rear factory mufflers with Borla's legendary straight-through multi-core technology. The S-Type configuration is designed for enthusiasts who demand a deeply aggressive muscle car growl under acceleration, yet want to maintain a refined cabin environment with zero acoustic drone at highway cruising speeds. By stepping up the structural tubing layout from the necked-down factory 2.25-inch diameter to high-volume 2.5-inch piping, this system optimizes exhaust gas velocity, uncovers hidden horsepower, and sharpens your throttle response.
Constructed to stand the test of time, this assembly is fabricated entirely from premium, aircraft-grade T-304 austenitic stainless steel. Highly superior to standard aftermarket T-400 series or basic aluminized tubing, this heavy-duty T-304 construction provides ultimate life-long resistance against deep rust, moisture corrosion, and structural cracking under heavy thermal loads. Precision computer numerical control (CNC) mandrel bends ensure a completely uniform path through the rear section, eliminating internal bottlenecks to guarantee smooth, restriction-free flow. The system is finished with a stunning pair of dual-split rear-exit 3.38" x 3" rectangular polished T-304 stainless steel intercooled tips on each muffler for a custom, period-correct appearance. This premium system is proudly backed by Borla's world-renowned Million-Mile Warranty.
Features
- Upgrades restrictive factory rear plumbing to high-volume 2.5-inch diameter performance piping
- Features patented straight-through and multi-core technology to optimize flow and increase horsepower
- Delivers the aggressive, deep Borla S-Type sound profile with zero interior cabin drone
- Stunning rear styling with dual 3.38" x 3" rectangular polished T-304 stainless steel intercooled tips
- Constructed completely from heavy-duty, premium T-304 austenitic stainless steel for life-long durability
- Ultra-smooth CNC mandrel bends eliminate internal bottlenecks for maximum exhaust gas velocity
- Protected by the industry-best Borla Million-Mile Warranty
Fitment By Year, Make & Model
1991 Chevrolet Corvette
- 1991 Chevrolet Corvette 5.7L V8 (Base/ZR-1 Coupe, Convertible, RWD, Automatic/Manual)
1990 Chevrolet Corvette
- 1990 Chevrolet Corvette 5.7L V8 (Base/ZR-1 Coupe, Convertible, RWD, Automatic/Manual)
1989 Chevrolet Corvette
- 1989 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
1988 Chevrolet Corvette
- 1988 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
1987 Chevrolet Corvette
- 1987 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
1986 Chevrolet Corvette
- 1986 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
1985 Chevrolet Corvette
- 1985 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
1984 Chevrolet Corvette
- 1984 Chevrolet Corvette 5.7L V8 (Base Coupe, Convertible, RWD, Automatic/Manual)
Important Application & Installation Notes:
- Fits **1984-1991 C4 Corvette 5.7L V8** configurations ONLY.
- Fully compatible with both **2-Door Coupe** and **2-Door Convertible** body styles.
- Fits **Rear Wheel Drive (RWD)** drivetrain models with automatic or manual transmissions.
- **MODIFICATION REQUIRED:** To properly complete this installation, you **MUST** modify the Original Equipment (O.E.) factory mid-pipe by expanding its outlets from 2.25 inches out to 2.5 inches to accept the new high-flow Borla inlet slips. It will not slide onto an unexpanded factory mid-pipe.
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