Description
Overview
The Flowmaster Manifold Downpipe Kit is purpose-built for the enthusiast who wants to run a full headers-back exhaust system while keeping the factory exhaust manifolds in place instead of swapping to headers. This dual downpipe kit bridges your stock Chevrolet BBC 3-bolt manifolds to the rest of your exhaust, giving you a clean, leak-free connection point and an easy foundation for the rest of your system.
Each kit is manufactured from 2.50-inch mandrel bent 409S stainless steel tubing, paired with high-quality flanges engineered for a precise, leak-free fit and a straightforward installation. The mandrel-bent construction preserves the full 2.50-inch inside diameter through every bend, promoting smooth, unobstructed flow from the manifolds rearward. The natural finish and 16-gauge tubing round out a durable, no-nonsense build meant to work hard under your Chevy.
Key Benefits
If you love the reliability, fit, and quiet character of factory cast manifolds but still want the freedom of a proper headers-back setup, this downpipe kit is the missing link. It lets you upgrade your exhaust without the hassle, clearance concerns, or gasket maintenance that often come with header installations — all while retaining the OEM manifolds you already trust.
- Dual downpipe configuration, sold as a matched pair (Quantity: 1 Pair)
- Constructed from 2.50-inch mandrel bent 409S stainless steel tubing for durable, smooth flow
- 16-gauge material with a natural finish for rugged, long-lasting service
- High-quality flanges designed for a leak-free fit and easy installation
- Bolts directly to factory Chevrolet BBC 3-bolt manifolds
- Includes donut gasket and donut sleeves for a complete, sealed connection
Fitment
This kit is specifically designed for the following Big Block Chevy applications: 1965-1974 Chevelle/El Camino, 1967-1972 Camaro, 1968-1969 Nova, 1968-1970 Caprice/Impala/Bel Air, and 1970-1974 Monte Carlo — all with BBC engines. It fits factory Chevrolet BBC 3-bolt manifolds, making it an ideal choice for classic Chevy owners who want to preserve their factory exhaust manifolds.
Why It Works
Because it retains your original manifolds and connects to a headers-back system, this downpipe kit delivers the best of both worlds: the simplicity and dependable sealing of a factory manifold setup combined with the upgrade potential of an aftermarket exhaust. The 2.50-inch main piping diameter and mandrel bends keep flow consistent, while the included donut gasket and donut sleeves ensure a tight, leak-free seal right out of the box. It’s a smart, cost-effective way to build out your exhaust without committing to a full header conversion.
Warning: This product carries a California Proposition 65 warning. Emission Code: 3.
