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Two questions
1) If I leave the exhaust stock (meaning not running it to the cutouts on the bumper) can I just bolt on the bumper leaving the spare in place? Or will the dual exhaust extensions themself hit the spare?
There's a bigger issue that's unrelated to the exhaust. The dual bumper doesn't have a hoist access point, so even if you kept the exhaust and spare the same behind the bumper, you wouldn't be able to lower the spare when you need it.
Are the fumes under the truck a bad idea? Any harm in that?
From my CB Radio.
If imagine it would be if there was nowhere for the fumes to escape. There's plenty of ground clearance for it to circulate and dissipate. Plenty of folks running turn downs.
This is true but in the winter when it's cold it'll also look silly seeing the exhaust coming from around the rear axle as opposed to the exhaust exits.
IMO if you can't run without a spare skip the dual exhaust bumper but that's just my opinion which doesn't mean much.
I am not totally sure that would bother me all that much, but I get your point.
There's a bigger issue that's unrelated to the exhaust. The dual bumper doesn't have a hoist access point, so even if you kept the exhaust and spare the same behind the bumper, you wouldn't be able to lower the spare when you need it.