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Investigate “Helm Hurtz” pipes.

Having to short of a header tube will rob low end torque. While many will use it because of ground clearance, they are missing low end torque. Longer header tubes make more torque. Short one are more focused on high rpm power production. In all honesty, I’ll make the purchase of the long tube...

The header pipe diameter should be sized to the amount of exhaust the port can pump out. A next size in diameter normally doesn’t hurt though you could, combo dependent, loose a little bottom end torque. The length of header pipe will broaden or shorten low end torque. The shorter the head...

The Wheels and tires forum is here on FABO.

On re reading this…. While the inner fenders are indeed a structural part, frame rail bracing isn’t needed. If you’re building a very high powered car, then bracing everywhere should be done. It’s not needed for a street hot rod. The amount of missing material is not that large.

Have you posted up in the wheels and tires forum under what tires your running so everyone knows what can fit? Also, what wheel and offset and tire brand are you running? Those are power losers though ground clearance is huge.

Out back, 275/60/15, a 28 inch tire. It’s about the maximum size to get in there EZ. Going larger will require precise measuring. Not all tire manufacturers produce an exact 28 inch tire, or, a 275/60/15. Actual diameters will vary slightly. Upfront is pretty much a stock tire size plus one to...

Dynomax makes the only “True” turbo as far as I know. Also they’re the highest flowing turbo muffler I can think of at the moment. Moving away from a turbo muffler, my favorite is the chambered muffler. I like the sound of the Hooker Aero Chamber muffler. The center in and out I like the best...

Is turning the T bar bolt for extra ride height out of the question? Did Holley/Hooker or Hedman stop making these? True that! Do you have contact information on “Jardine?” A name I am unfamiliar with.

Same header, less ground clearance in a manual trans car vs an automatic. Bullshit They, shorty headers, provide less torque. That is essentially what a street car is looking for. Comparing a modern car to old cars is smudging the whole thread as comparing todays tech to yesteryears cars...

TTI, 1-3/4 - 1-7/8, Long tube headers. If you’re using a high quality high flow muffler, 2-1/2 will do. Shorty headers are a waste of time, money and power. The smaller header @ 1-5/8 chokes power up top a lot. Small tube header is a waste of time, money and power. Ease of install? No such...

Drone is t always a muffler issue. Quite mufflers with a mello rumble? Dynomax turbo mufflers.

Best fitting headers in the standard 1-5/8 tube size is Summit Racing - then a tie between Hooker and the non standard and expensive TTI stepped header. Hedman was also very good. Everything else sucked *** and needed to meet my adjuster, Mr. S Hammer Jr.. Mr. Sledge is a good friend of...

LMAO! THANK YOU!!! I was notified and I did notice in the video. I had no idea. Better to inform that not. Thanks. I had no idea. I’ve never had this happen to me. I’m not sure where to go with it yet. I have a bit on the table to do first. Starting with the wife’s car and then I’ll get back to...

Actually only a few are turbos. The Dynomax turbo is a true turbo muffler and most others are not. Read the description in the below custom video for you I just made, so - with hopes - you can get a good idea how what I have sounds. I forgot to add in…. I reved up the engine from idle to...

Walker “Quite Flow” or the “Sound FX” mufflers. This is the following method for suggest for a quite ride without getting crazy. Headers or manifolds, it doesn’t matter, but afterwards… Use an “H” or “X” pipe, I like an H because it’s quick and easy. At the OEM muffler location, use the...

Even though the pictures suggest they are and the part numbers are only 1 digit different, a call to summit to confirm would be the best move. Hammer that 1-800 number! The bottom ones (uncoated) I currently have on my 340 Duster. I’ve used them on my ‘73 Cúda and my ‘79 Magnum.

In ‘74, the 360 made it into the Duster. Not what I’d call a peppy engine year for any car.

That is an H pipe, IDGAF what Holley says it is. I’d return it if I opened up the box and seen that. That’s just me. Not an X pipe!

Oh course it did. I’m sure it also got 27 MPG’s and ran as clean as today’s cars and lasted 750,000 miles before it needed a spark plug replacing. Gloating is pointless and makes you sound ridiculous. Have a great day.

Hey Bruce. It’s really this simple, the OEM exhaust system was horse power stifling. The sound of the car was what it was and just fine IMO, however, many people want to increase the sound level and/or the sound. Swapping out or changing the muffler and/or the entire exhaust system adds power...

Other than the great fitting but a bit pricey TTI or Doug headers, the best fitting and amazingly cheapest header I found is the best one I have used with a thicker 3/8 flange (longer header bolts required of not in the box) are the headers by Summit Racing. I have a set in use right now. But...

What cpearce said. Pulling the transmission is easier with true duals. And H pipe can cause some interference while the X is dead in the way. There is that exhaust note sound change which is mostly heard different under a heavy throttle & wise open. After that, the power difference in most...

Soooo disagree with this. The state of tune will have an effect however the sound waves are the reason for droning. Goggle Helmhurtz or some spelling to that effect.

IMO, since I have both systems in place on two cars, it’s more about sound since the difference in HP is so little it’s silly. The “H” pipe has more of that traditional muscle car sound while the “X” pipe will smooth out the exhaust pulses mellowing the normal idle pulses your used to hearing...

If the sound isn’t all there for you, choose the muffler you want to use and install it. The kit can come without mufflers. FWIW, they performed very well on the Engine Masters show. Dynomax mufflers are a little quieter and have more low tone. Hooker Aero Chanbers are about the same with an...

The car engine was stone cold on this November day where you can hear the Jegs (Summit the same) exhaust kit and mufflers on a low compression 318 w/Hooker 1-5//8 headers recorded from the cell phone. (Old video)

There are members here that have in the past, just wait on there responses. As I have only done the 2-1/2 kit, I echo the above. What I do remember about the 3 inch kit is obviously it’s a bit tighter and with moved in springs, it’s a no go. The tubes are too big to fit with the springs moved...

Best cheap header = Summit racings offering. The draw back is 3 tubes under the steering linkage. Otherwise they have always fit excellent and have a thick 3/8 header flange. In a tie, Doug’s headers with TTI headers. I have used the TTI. Near perfect fit, thick flange, no tubes under the...

They fit for me and I put them on the ground as described to you in your other post. They’ll go in.