it depends completely on what your idea of a twin system is.
a twin system 2 individual exhausts from each set of exhaust manifolds, generally with a cross over pipe.
as mentioned earlier, a twin system as mentioned above is possible.
If you're under the impression that a twin system is exits on either side of the car, then yes, the fuel tank makes this tricky.
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FALCN6 - Turbo, Air Bag Suspension - Hibernating
EL GT - Supercharged
NASCAR - 83 Thunderbird , Bagged
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