Answer
Jan 23, 2025 - 08:06 PM
When choosing exhaust for a big block Chevrolet, Buick, Olds, or Pontiac, a general rule of thumb is 2.5" is adequate up to 550 hp whereas greater than 550 hp would benefit from dual 3" exhaust. This applies to Magnaflow straight through zero restriction. or similar design, exhaust systems only. The Magnaflow 15898, a 3" stainless performance exhaust system, is an excellent choice for optimizing exhaust flow and engine performance in a Big Block Chevy (BBC) engine, particularly for vehicles like the 1970 Chevelle. This system is specifically designed for A Body models, including the Chevelle, Cutlass, El Camino, Monte Carlo, Skylark, GS, and GTO. With its 3-inch diameter, it effectively balances exhaust size and backpressure, making it ideal for street applications while providing the necessary capacity for high-performance setups.
