Answer
Jan 23, 2025 - 08:07 PM
The size of the exhaust you need depends on several factors, including the engine's displacement, horsepower, and intended use of the vehicle. For a 1970 Chevelle, a 3-inch exhaust like the Magnaflow 15898 Stainless Performance Exhaust System is an ideal choice, especially for big block engines, as it efficiently expels gases and optimizes performance. Consulting the vehicle manufacturer’s specifications or a professional mechanic can provide guidance tailored to your specific vehicle and performance goals. Dual 2.5" up to 550HP, dual 3" over 550HP is a good rule to follow.
