Muffler Suggestions

[Broadkill1]

I have read threads on this subject from years ago however I have just had new stainless headers and side pipes completed for my big block and would like to have muffler suggestions that produce a great sound without setting off the neighbors alarm system and ones that do not greatly reduce horse power. Any Suggestions?

[spdbrake]

I recently switched to Flowmaster slimline and dropped approx 5-7db over the stock Backdraft mufflers. The flowmaster flow better from the look of the internals.
The Stainless case polishes out nicely (with determination,,,,)
https://www.flowmastermufflers.com/s...20Mufflers&kw=

[Gaz64]

Damm, I was hoping to be the first to say Flowmaster.

Thick wall casing, sound wave absorption technology, first manufacturer and still the best.

[t walgamuth]

Those sound very good! Can the stainless be welded to regular steel?

[spdbrake]

Yes, either TIG or MIG will work. Filler rod 309 is prefered but some folks use 308 with good results.

[t walgamuth]

Thanks SPD!

[cycleguy55]

There's a long thread on the Factory Five forums that's worth a look: Are these THE side pipe mufflers to get? Flowmaster 13530320 Slimeline - FFCars.com : Factory Five Racing Discussion Forum

If you're looking for dyno results, you can find them in post #61 of this thread: Muffler Testing - FFCars.com : Factory Five Racing Discussion Forum