I'm looking also. Diamond Eye seems to e the least expensive, $299 for a Aluminized 4" single with muffler. Think the 5"was $ 339 or $399.Google it.
MBRP 5" Through Darkhorse Diesel is $509.
ToolManGary on here installs a couple systems every month. He only installs Diamond Eye or MBRP. Nothing else fits correct in his vast experience. Diamond Eye is a good sounding system, good investment. MBRP is just so damn expensive.
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