What is the fine-grained topic of the following text: For the SRT8 and the 2005-2008 5.7L with Square Port heads, we went a few steps further by offering our systems with various primary sizes, (1-3/4"', 1-7/8" and 2") to fit applications from stock to well over 1000 RWHP. Only return the topic.
Exhaust system options for SRT8 and 2005-2008 5.7L with Square Port heads