I think that pipe is for a stadium truck or MT, looks much too big for a touring car.
For these cars your only real options are:
HPI A870 can-style muffler (cheapest option)
HPI A869 side muffler set
HPI A970 tuned pipe and header set
HPI (or dynamite) header + any slip fit LH touring car...
Ah gotcha, I thought you meant A970 tuned pipe, which I do have one for sale!
Technically because you have a 2 speed, that belt tensioner should be flipped with the adjustment screw being on the bottom side.
It’s a solid foundation, even has a 2 speed! And a racing fuel tank! A new foam bumper is luckily still produced and very cheap #6274
I’d recommend a new belt kit (aftermarket sets are available on eBay for a good deal) and CVD shafts.
Since you scored a sweet A907 pipe you’re all set there...