The L-69 high output 305 is a different exhaust proposition than the base LG4, and the header set for it is sized accordingly, which is why the two part numbers are not interchangeable. This is the L-69 version for 1983-1988 Monte Carlo. Like the rest of the TES range it keeps the stock emissions equipment operational rather than requiring a delete.

Edelbrock 68792 Tubular Exhaust System Details:

• Header kit for 1983-1988 Chevrolet Monte Carlo with the L-69 high output 5.0L V8.
• Tubing is larger than the equivalent LG4 low output version, so verify your engine code before ordering.
• Replaces the factory cast exhaust manifolds.
• Accepts stock emissions equipment so the system remains connected.
• Sold as a kit. Do not apply thermal wrap or additional coatings, which voids the warranty.