Muffler recommendations? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68-Mike · 01-14-2005, 01:25 PM

I'm putting on a new dual exhaust on my '68.

Does anyone have any recommendations for muffler brand/type? I'm looking for a good solid throaty sound.

Thanks in advance.
Mike

LUV2XCLR8 · 01-14-2005, 01:55 PM

ARE YOU RUNNING FULL LENGTH PIPES OR TURN DOWNS

FULL LENGTH PIPES - http://www.magnaflow.com/ OR http://www.flowmastermufflers.com/cgi-bin/flowmaster

TURN DOWNS AFTER MUFFLERS - http://www.magnaflow.com/
(THE FLOWS ARE TO DAMN ANNOYING AT THE 65-85 MPH RANGE)

JMHO

68-Mike · 01-14-2005, 03:54 PM

Quote:

Originally Posted by LUV2XCLR8

ARE YOU RUNNING FULL LENGTH PIPES OR TURN DOWNS

FULL LENGTH PIPES - http://www.magnaflow.com/ OR http://www.flowmastermufflers.com/cgi-bin/flowmaster

TURN DOWNS AFTER MUFFLERS - http://www.magnaflow.com/
(THE FLOWS ARE TO DAMN ANNOYING AT THE 65-85 MPH RANGE)

JMHO

Excuse my ignorance, but what are 'Turn Downs'?

I'm running headers with the duals routed below the xmission x-member and out the rear.

Do you recommend any specific model of Flowmaster or Magnaflow?

Thanks,
Mike

LUV2XCLR8 · 01-14-2005, 04:05 PM

Quote:

Originally Posted by 68-Mike

Excuse my ignorance, but what are 'Turn Downs'?
Thanks,
Mike

SORRY MIKE, I USED TO WORK AT A MUFFLER AND BRAKE PART TIME ON
THE SIDE, YOU GET USED TO THE LINGO AND FORGET TO EXPLAIN, WHEN
SOMEONE ASKES FOR "TURNDOWNS" IT IS BASICALLY LIKE PUTTING A TIP
"ANGLED OR TURNED" RIGHT AFTER THE MUFFLER, IN OTHER WORDS THEY
ARE NOT RUNNING TAIL PIPES, IT DEAD ENDS RIGHT AFTER THE MUFFLERS.

MOST SHOPS DO NOT CARRY ALL OF THE MODELS YOU SEE ON THEIR
WEBSITES DUE TO COST, I HIGHLY RECCOMEND STAINLESS MUFFLERS
IF IT IS ON A RESTO OR SHOW TRUCK, REGULAR STUFF FOR CRUISERS,
OF COURSE STAINLESS IS MORE, JMHO, BUT IF RUNNING ALL THE WAY
OUT TO THE MUFFLER I WOULDN'T USE FLOWS, DON'T GET ME WRONG,
THEY SOUND AWESOME, BUT THEY CREATE AN INTERIOR HUM, KINDA
LIKE A PRESSURE TYPE RATTLE IN YOUR CAB, THE MAGNAFLOW'S ARE
KINDA NEWER ON THE MARKET THAN FLOWS, BUT I REALLY PREFER EM,
ALSO WHEN YOU GET READY TO DO IT, HAVE THEM PUT IT ON THE
RACK, CUT OFF THE OLD, AND THEN HOLD THE NEW ONES UP THERE
WHILE SOMONE CRANKS YOUR TRUCK, THEY CAN RAP SHOP TOWELS
AROUND THE INLET AREA FOR A TEMPORARY SOUND CHECK, HAVE
THEM TRY SEVERAL TYPES AND SEE WHAT YOU LIKE, MY BUDDY IS
IN THE BUISNESS AND CARRIES ALL OF THESE, FUNNY PART IS THAT
THEY ALL COST THE SAME AMOUNT WHEN HE PRICES HIS DUAL JOBS

FLOWMASTER
MAGNAFLOW
RAVEN
FLOWSOUND
DYNOMAX
BORLA
THRUSH

HOPE THIS HELPS

N242MUCH · 01-14-2005, 04:11 PM

Quote:

Originally Posted by 68-Mike

Excuse my ignorance, but what are 'Turn Downs'?

I'm running headers with the duals routed below the xmission x-member and out the rear.

Do you recommend any specific model of Flowmaster or Magnaflow?

Thanks,
Mike

Turn downs are where the end of the pipe in back is turned down blowing exhaust towards the ground.

2low72 · 01-14-2005, 04:39 PM

I have 40 series 2 chamber flowmasters dumped (turn downs) before the rear end. it's throaty but LUV2XCLR8 is right. At highway speeds they do tend to get annoying to most people. my opinion, I love to hear them roar.

LUV2XCLR8 · 01-14-2005, 05:13 PM

Quote:

Originally Posted by 2low72

I have 40 series 2 chamber flowmasters dumped (turn downs) before the rear end.

YUP, MY 67 SWB W/ 400 SB AND FLOWS LOOKED JUST LIKE THAT

longnlow72 · 01-14-2005, 05:53 PM

i know everyone and theyre dog has 40 series but they are still my top chioce

454_72_4X4 · 01-14-2005, 06:17 PM

I've got regular old glasspacks on mine from JC Whitney. Mine are 3in core and I've got 3in pipe all the way from just in front of the trans cossmember to the back.They exit out the sides behind the rear wheels.
I wouldn't trade the way it sounds for 10 sets of Flowmasters. Don't get me wrong I like the sound of the Flows just as well as the next gearhead but I like my glasspacks better! Flows are to spendy for a driver/work truck, (to me), anyway.
The last exhaust I had on it had the same mufflers only 2-1/2in core and 2-1/2in pipe and lasted almost 10 years.

71-longbed · 01-14-2005, 08:47 PM

is there any downside to having the exhaust dump underneath the truck ???

Super Duck · 01-14-2005, 09:23 PM

the only down side to having turn downs is that in trafic you tend so get more exaust in the truck. but hey thats how you know if it is running rich. as far as what kind of muffler you run get one you like the sound of. I prefer flows, and have found that most of the "chamberd" muflers sound close to the same. I am sorry if I afend but glass packs are junk, they will actualy rob power and to me sound cheap. but there again it is what you like the sound of.

rin68 · 01-14-2005, 11:43 PM

hooker aerochambers are another great muffler. they sound different than flowmasters and are very mellow at cruising speeds. at wide open they sound great. i've got a pair on the 68 and love 'em.

camaro__thunder · 01-15-2005, 02:12 AM

I love the sound of my 3" 1 chamber Flows dumped. Took them off the racecar

Borla has a great raspy sound also. The question is how loud do you want it or not ??

dave3156 · 01-16-2005, 03:03 AM

I have dual 40 series Flowmaster's and have no kind of "bad hum" in the cab. I also have dual 18" Sivertone stainless exhaust tips which further tune the sound of the Flowmasters. The sound is a product of an exhaust system, not just the muffler. I have Hooker headers which start the process. Alot of people think that you can get the sound you want just with a certain type of muffler. Think of it as a system. Its a product of engine air flow, header choice, exhaust pipe size, muffler choice and exhaust tip choice. All of these can result in a different sound. Go to a quality custom exhaust shop in your area and tell them what you just said about how you want it to sound. By manipulating the variables listed, you can create any type of sound and exhaust flow you want without the negative aspects which were mentioned earlier in the post. Good luck and have fun, thats what its all about!

HeavyD · 01-16-2005, 03:25 AM

What about Delta Flow Series? Or DynoMax Super Turbo?

454_72_4X4 · 01-16-2005, 11:20 AM

Quote:

Think of it as a system. Its a product of engine air flow, header choice, exhaust pipe size, muffler choice and exhaust tip choice.

I agree totally...As a matter of fact my truck has a complete different sound on the right side as compared to the left side. You wouldn't know its the same system from one side to the other. The right side has 2 extra bends in the pipe, (to clear the transfer case), than the left side. Those two bends make a world of difference.
My old exhaust, (2-1/2in muffler core and pipe), had the same sound differences but was slightly quieter and sounded approximatly the same with anything from a 305 to the 396 blowing through it.

Vince M · 01-16-2005, 02:07 PM

I've had Flowmasters and on my current project I went with Hooker Aerochambers. They're cheaper than Flowmasters, have good construction, insulated, and have a straight through design. Haven't heard them yet though, still wrenching on the truck.

beagler · 01-16-2005, 03:13 PM

I got hooker headers with dynomax super turbo mufflers. The just stop about a foot maybe a half a foot behind the cab. out side the truck they sound awsome but inside the truck that is a different story. You can't talk but that is not really a bad thing. but it does get anyoning. hooker headers rule

Robert1970C20rstbukt · 01-16-2005, 04:11 PM

I like the sound of glasspacks better, they've got that awesome 50's hotrod sound.

01-14-2005, 01:25 PM	#1
68-Mike Registered User Join Date: Dec 2002 Location: Austin, TX Posts: 135	Muffler recommendations? I'm putting on a new dual exhaust on my '68. Does anyone have any recommendations for muffler brand/type? I'm looking for a good solid throaty sound. Thanks in advance. Mike __________________ 7th year of '68 C-10 LWB Rebuild in progress. Drivetrain done. Frame stripped, painted & rebuilt. Body/paint next. '18 Yukon '04 Sierra 4X4 ‘77 Chevy C-20 Camper Special ‘68 C-10 Shopping for a 69-72 4x4 Blazer or Jimmy

01-14-2005, 01:55 PM	#2
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	ARE YOU RUNNING FULL LENGTH PIPES OR TURN DOWNS FULL LENGTH PIPES - http://www.magnaflow.com/ OR http://www.flowmastermufflers.com/cgi-bin/flowmaster TURN DOWNS AFTER MUFFLERS - http://www.magnaflow.com/ (THE FLOWS ARE TO DAMN ANNOYING AT THE 65-85 MPH RANGE) JMHO __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

01-14-2005, 04:39 PM	#6
2low72 Registered User Join Date: Mar 2004 Location: Cheyenne, Wy Posts: 555	I have 40 series 2 chamber flowmasters dumped (turn downs) before the rear end. it's throaty but LUV2XCLR8 is right. At highway speeds they do tend to get annoying to most people. my opinion, I love to hear them roar. __________________ 2014 GMC Yukon XL (Wifey's) 2004 Chevy Silverado Crew Cab Z71

01-14-2005, 05:53 PM	#8
longnlow72 Registered User Join Date: Aug 2004 Location: SW Washington Posts: 947	i know everyone and theyre dog has 40 series but they are still my top chioce __________________ 72 Chevy lwb, cowl hood, shaved antenna, shaved bedrails, blazer tank, sidemarker fill, 1pc windows, flowmaster 40's, alpine deck, infinity 6x9's, infinity 4"ers, 2 jl audio 10w0's, grant wheel, keyless entry and alarm, more waiting to be done...

01-14-2005, 06:17 PM	#9
454_72_4X4 Registered User Join Date: Apr 2004 Location: N.E. MO Posts: 1,749	I've got regular old glasspacks on mine from JC Whitney. Mine are 3in core and I've got 3in pipe all the way from just in front of the trans cossmember to the back.They exit out the sides behind the rear wheels. I wouldn't trade the way it sounds for 10 sets of Flowmasters. Don't get me wrong I like the sound of the Flows just as well as the next gearhead but I like my glasspacks better! Flows are to spendy for a driver/work truck, (to me), anyway. The last exhaust I had on it had the same mufflers only 2-1/2in core and 2-1/2in pipe and lasted almost 10 years. __________________ 72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey

01-14-2005, 08:47 PM	#10
71-longbed Its Magically Delicious Join Date: Jan 2003 Location: oregon Posts: 2,398	is there any downside to having the exhaust dump underneath the truck ??? __________________ 71 C10 LWB 350sbc -TH350 12 bolt 3.42 Posi Of all my favorite things to do, The utmost is to have a brew. My love grows for my foamy friend, with each thirst-quenching elbow bend. Beer so frosty, smooth, and cold it's paradise pure liquid gold. Yes beer means many things to me that's all for now cus I gotta pee.

01-14-2005, 09:23 PM	#11
Super Duck Chevy Nuttttt Join Date: Sep 2004 Location: Santa Maria Ca. Posts: 568	the only down side to having turn downs is that in trafic you tend so get more exaust in the truck. but hey thats how you know if it is running rich. as far as what kind of muffler you run get one you like the sound of. I prefer flows, and have found that most of the "chamberd" muflers sound close to the same. I am sorry if I afend but glass packs are junk, they will actualy rob power and to me sound cheap. but there again it is what you like the sound of. __________________ 67' Chev swb step side 69' SS elky 03' Chev ext cab 4X4 hey who lernt me to spell is there anything else?

01-14-2005, 11:43 PM	#12
rin68 Senior Member Join Date: Mar 2000 Location: East Peoria, IL Posts: 600	hooker aerochambers are another great muffler. they sound different than flowmasters and are very mellow at cruising speeds. at wide open they sound great. i've got a pair on the 68 and love 'em. __________________ 1968 C10 - 383, non-stop project 1969 Camaro - 327, bone stock family heirloom...soon to be LS/T56, Ridetech, all the goodies

01-15-2005, 02:12 AM	#13
camaro__thunder Epoxy Primer Friendly Join Date: Feb 2004 Location: South of Houston TEXXXAS Posts: 680	I love the sound of my 3" 1 chamber Flows dumped. Took them off the racecar Borla has a great raspy sound also. The question is how loud do you want it or not ?? __________________ My Project 69 SWB SHAVED BAGGED DOORED

01-16-2005, 03:03 AM	#14
dave3156 Registered User Join Date: Mar 2004 Location: St. Louis, MO Posts: 336	I have dual 40 series Flowmaster's and have no kind of "bad hum" in the cab. I also have dual 18" Sivertone stainless exhaust tips which further tune the sound of the Flowmasters. The sound is a product of an exhaust system, not just the muffler. I have Hooker headers which start the process. Alot of people think that you can get the sound you want just with a certain type of muffler. Think of it as a system. Its a product of engine air flow, header choice, exhaust pipe size, muffler choice and exhaust tip choice. All of these can result in a different sound. Go to a quality custom exhaust shop in your area and tell them what you just said about how you want it to sound. By manipulating the variables listed, you can create any type of sound and exhaust flow you want without the negative aspects which were mentioned earlier in the post. Good luck and have fun, thats what its all about!

01-16-2005, 03:25 AM	#15
HeavyD Senior Member Join Date: Sep 2004 Location: Wakaw, Sask, Canada Posts: 3,180	What about Delta Flow Series? Or DynoMax Super Turbo? __________________ "You can take the man out of PA, but you can't take PA out of the man"

01-16-2005, 02:07 PM	#17
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	I've had Flowmasters and on my current project I went with Hooker Aerochambers. They're cheaper than Flowmasters, have good construction, insulated, and have a straight through design. Haven't heard them yet though, still wrenching on the truck. __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

01-16-2005, 03:13 PM	#18
beagler Registered User Join Date: Oct 2004 Location: Cincy, OH Posts: 190	I got hooker headers with dynomax super turbo mufflers. The just stop about a foot maybe a half a foot behind the cab. out side the truck they sound awsome but inside the truck that is a different story. You can't talk but that is not really a bad thing. but it does get anyoning. hooker headers rule __________________ '71 GMC 350 bored, cam'd, straight pipes LOOKING FOR A 4x4 redz 1970 K5 "Time has stopped for our classic trucks, and as such maintain nostalgia and simplicity of the vehicles and of an era passed."

01-16-2005, 04:11 PM	#19
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	I like the sound of glasspacks better, they've got that awesome 50's hotrod sound. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck



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