Judge Ken

I have a 1990 F150 that has a Flowmaster single entry to dual out muffler with twin pipes. It want it louder. I read that holes can be drilled in certain spots to make it louder but an not sure about this. I would appreciate suggestions.

PerryB

Don't drill holes. It just gives it a place for rust to start and will likely cause backfire upon deceleration.

uzikaduzi

cut the dual outs and put in turn downs... if you drive this a lot, the done is going to get annoying

Judge Ken

Thank you Senior Member. I appreciate the input.

Others, I am open for other options if you have them.

Judge Ken

chimmike

you want it louder? Ditch the muffler all together and run straight pipes. That'll be plenty loud to raise any of your dead relatives clear out of the soil.

tareed94

How loud are you going for? Me personally, I'd run pipes off of each cat, to 12" cherry bombs, and then straight out the back. I did it on my '07 F-150 with the 5.4, sounded mean and was LOUD. I used to set off car alarms. No crossover at all, what you heard out of the tailpipe was the sound from each bank.
Garage

Judge Ken

Judge Ken

Mastercraft1981SnS

If you want loud just cut the mufflers off the truck.

chimmike

don't waste your money on glasspacks of any sort. the packing blows out of 'em after a week. total crap. Also are we talking V8 or inline 6?