Out of stock
SKU: PYPDGA20S33
UPC: 846861000120
MPN: DGA20S33
The PYPES PERFORMANCE EXHAUST 64–81 Pontiac with Ho-Ra 3 Bolt 2.5-inch Manifold Downpipe is a stainless steel intermediate exhaust section designed for classic Pontiac engines equipped with stock 3-bolt manifolds. This pair of downpipes connects high-output Ho and Ram Air engines to the mid-pipe assembly, providing a direct flow path that reduces backpressure while maintaining factory manifold compatibility.
Constructed from stainless steel in natural finish, the pipes resist corrosion and thermal degradation common in traditional mild steel exhaust systems. The 2.5-inch diameter represents a proven compromise between scavenging efficiency and velocity maintenance for mid-range Pontiac V8 displacement. Each piece measures 48 inches in length, allowing proper fitment from the manifold flange to the rear axle centerline on 1964–1981 Pontiac chassis. The 3-bolt flange connection ensures secure engagement with Ho and Ram Air 1-4 manifold casting patterns without modification.
This downpipe assembly serves street performance builds, restorations, and weekend drivers prioritizing bolt-on efficiency gains over radical engine modifications. Classic Pontiac enthusiasts upgrading from restrictive original equipment find measurable gains in mid-range torque and engine response. The stainless construction appeals to restoration projects where longevity and finish quality matter across a multi-decade ownership span. Direct bolt-to-manifold installation requires no fabrication or custom bracketing when used with factory-spec Ho or Ram Air induction systems.
Pypes Performance Exhaust maintains reputation for cast-to-fit accuracy and weld quality in the classic muscle car restoration segment. These downpipes function as the foundation tier of a larger exhaust system; pairing with compatible mid-pipes and mufflers ensures optimized scavenging characteristics across the entire power band. The pair weight of 14.5 pounds reflects substantial gauge stainless construction rather than thin-wall substitutes prone to resonance.
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