SN Waterbox

Hey guys I bought a 91 sj a not too long ago and I found out that a previous owner took out the waterbox and replaces it with what looks like a piece of pvc. It runs fine but it backfires quite a bit and I don't like the idea of not having something on there that it was meant to have. Any suggestions or advice? Thanks!!
 

bored&stroked

Urban redneck
Location
AZ
Square nose for cheap, roundnose for longevity, aftermarket for sound more like what you have now. I run a stock square box, and my girlfriend has a TDR.
 
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