I had them out the back before and now I have turn downs, and its definatly louder, especially at idle. Its a lout more rumbly, and I only have 3 chambers. Its just right. I dont think I'd want it any louder at all.
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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
Runs on 87 Octane and gets 24mpg!