TTI Headers on a stock 440?

Engine, Trans & Driveline

  1. 70383ChargerSE

    70383ChargerSE Active Member

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    I have a stock 70 440 in my charger with 906 heads, a holley carburetor and an edelbrock performer intake manifold. The car currently has maybe a small step above the original cam maybe even an original magnum cam and exhaust manifolds and 3.23 gears. The car runs great.

    But, like most of us. The thought of having a little more power is tempting. I don't wanna tear into the engine but have thought of putting on some tti headers.

    What type of gain would something like this be worth? 15hp? Since I plan on keeping it a stock engine, would 1 7/8 headers be better or 2"? It currently has a 2.5" Flowmaster exhaust.

    Thank you all in advance
     
  2. IQ52

    IQ52 Well-Known Member

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    "The car runs great."

    If it ain't broke......don't fix it!
     
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    • forphorty

      forphorty Well-Known Member

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      • BSB67

        BSB67 Well-Known Member

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        Cam specs will matter, but probably 20 hp. I would go with 1 3/4” headers. Folks have gone absolutely nuts on header size. You’re probably 100 hp short of even thinking about 1 7/8” headers.
         
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        • davek

          davek Well-Known Member

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          big money for only 20hp, I like the stock look and wont have to worry about the starter.
           
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          • Sahara

            Sahara FBBO Gold Member FBBO Gold Member

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            Yeah, tti headers are pretty pricey for what you have there. I’d go cheaper headers. But that’s just me, it’s your car and money.
             
          • OSDart

            OSDart Well-Known Member

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            Keep the stock hp manifolds, if you have them. I doubt you'd see much, if any, horsepower gain going to long tube headers.
             
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            • lewtot184

              lewtot184 Well-Known Member

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              i'd probably just leave it alone but if headers are a must 1 3/4 is enough or perhaps look at tti's shorty header.
               
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              • Sinitro

                Sinitro Member

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                TTi headers are pricey but..
                They fit fine for the B Bodies, excellent build quality..

                Just my $0.02... :thumbsup:
                 
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                • Cojohnso1

                  Cojohnso1 Well-Known Member

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                  My '69 GTX is VERY simular. And runs well. The car is not numbers matching. (Really not even close.) But period correct. It's VERY tempting to look for more performance. But I know myself. And I am capable of screwing up something that shouldn't have been touched. So if I was to go for higher performance? Go all in. On different engine, suspension upgrade and drivetrain gear sets. JMO.

                   
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                  • diesel_lv

                    diesel_lv Well-Known Member

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                    Stock engine, 440 has so much stock. My 2bbl 383, when I inherited it, kept stock everything except manifold back. Had 2" installed very professionally, looked stock. Sounded amazing, kept under hood temps down, and would still spank a stock 5.0 Mustang w 2.9? gears in a '67 4dr. IMHO, unless you're gonna dig into the engine, the stock setup w duals will sound great and have more than enough torque
                     
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                    • 70383ChargerSE

                      70383ChargerSE Active Member

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                      Thank you everyone for your responses. I know, if it ain't broke don't fix it. It's just weird to not chase more power for me. For my old 69 Dart, I started with a stock 360 and then went all in with aluminum heads, big cam etc. So to have a stock-ish engine is weird but being able to start it up, let it idle for 30 seconds and be able to drive away is nice. I think it sounds good.

                      @Cojohnso1 that sounds nice. Purple shaft cam or is that stock?

                      If I do go with headers, 1 3/4 or 1 7/8 it is.

                      Here's mine
                       
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                      • diesel_lv

                        diesel_lv Well-Known Member

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                        Chasing horsepower is great. But if you're not going to get into the engine, the headers, that are small enough to work w stock, are not worth the money or effort. "When" you decide to dig into the engine, then spend the money on what you need. I doubt you're 16 n listening to your ego.
                         
                      • 67charger383

                        67charger383 Well-Known Member

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                        Screenshot_20201019-155108~2.png
                        Hooker 5903-1HKR 1-7/8in primary 3in collector
                        upload_2021-5-16_1-11-56.png
                         
                      • Cojohnso1

                        Cojohnso1 Well-Known Member

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                        It's a purple grind. But just a small step up from stock.
                         
                      • Outlawd

                        Outlawd Well-Known Member

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                        Do what makes YOU happy. If you want headers on then do it, you will gain a little horse, just knowing you got them on in your mind you will gain alot of horses, lol. TTI's are good but I like "Doug's Headers" better, kinda spendy but you get what you pay for. They fit like they should no starter, steering box, or plug wire issues. Get yourself a pair of 1 3/4 ceramic coated you will love them!!
                         
                      • Lelo 500

                        Lelo 500 Well-Known Member

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                        I think the Dougs are only 2" for RB engines.
                         
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                        • Carcinogen

                          Carcinogen Well-Known Member

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                          Headers can be a real pain chasing header leaks. I’ve had good luck with multi layer aluminum gaskets.

                          At your power level smaller headers would be ok, larger tubes are usually more difficult to install.

                          Recent trend is going back to stock manifolds for reduced maintenance and stock sound. Just look at the cost of magnum exhaust manifolds lately.
                           
                        • hunt2elk

                          hunt2elk FBBO Gold Member FBBO Gold Member

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                          If you go with headers, you should think about upgrading to a Performer RPM intake as well. Air in, air out. Then a set of aluminum heads and a bigger carb. Got to decide where a guy stops.......
                           
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                          • Orig69

                            Orig69 Member

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                            I have the same intake manifold on my 440, a cost effective horsepower gain for my car was switching the original 4 bbl Holley carb to a Thermoquad carb. It was years ago but I only paid $15.00 for the Thermoquad carb and it was definitely a power increase and it drove better in hot weather.
                             
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