m menu image  m home

Product List

A New Product->
Air Conditioning Custom Kits->
Automotive and Marine Covers
Brakes->
Carburetor Modifications
Carburetors->
Chrome Accessories->
Chute Kits->
Clutches->
Cold Air Kits->
Custom Hoods->
Custom Parts Development->
Cylinder Head Porting->
Electric Cooling Fans->
Electronics and Delay Boxes->
Engine Parts->
  |_ Camshaft Thrust Buttons->
  |_ Camshafts->
  |_ Cylinder Heads->
  |_ Dodge SRT4 Turbo->
  |_ Engine Components->
  |_ Engine Girdles->
  |_ HEMI 5.7L, 6.1L, 6.4L Components->
    |_ 5.7 / 6.1L Hemi Gasket Sets->
    |_ 5.7 / 6.1 Hemi Alternator Fan
    |_ 5.7 / 6.1 Hemi Roller Rockers
    |_ 5.7 / 6.1 HEMI Turbo Kits
    |_ 5.7 / 6.1L Billet Accessories
    |_ 5.7 / 6.1L Hemi Axle Hub Kit
    |_ 5.7 / 6.1L Hemi Belts
    |_ 5.7 / 6.1L Hemi Bolts and Studs
    |_ 5.7 / 6.1L Hemi Camshafts
    |_ 5.7 / 6.1L Hemi Cold Air Kits
    |_ 5.7 / 6.1L Hemi Connecting Rods
    |_ 5.7 / 6.1L Hemi Converters->
    |_ 5.7 / 6.1L Hemi Crank Dampers
    |_ 5.7 / 6.1L Hemi Crankshafts
    |_ 5.7 / 6.1L HEMI Engine Bearings
    |_ 5.7 / 6.1L Hemi Exhaust
    |_ 5.7 / 6.1L Hemi Fuel Injectors
    |_ 5.7 / 6.1L Hemi Fuel Rails
    |_ 5.7 / 6.1L Hemi Intake Manifolds
    |_ 5.7 / 6.1L Hemi Nitrous Systems
    |_ 5.7 / 6.1L HEMI Oil Pans->
    |_ 5.7 / 6.1L Hemi Oiling System
    |_ 5.7 / 6.1L Hemi Piston Rings
    |_ 5.7 / 6.1L Hemi Pistons
    |_ 5.7 / 6.1L Hemi Superchargers
    |_ 5.7 / 6.1L Hemi Suspension
    |_ 5.7 / 6.1L HEMI Throttle Bodies
    |_ 5.7 / 6.1L Hemi Timing Sets
    |_ 5.7 / 6.1L Hemi Transmissions
    |_ 5.7 / 6.1L HEMI Tuning
    |_ 5.7 / 6.1L Hemi Valvetrain
    |_ 5.7 6.1 6.4 Hemi Cylinder Heads
    |_ 5.7L Hemi Water Pump
    |_ 6.1L HEMI Aluminum Blocks
    |_ 6.1L Hemi Lifters
    |_ Carbon Fiber
    |_ Custom 5.7 / 6.1L Chipkiller
    |_ Custom Hemi Billet Main Caps
    |_ Custom Hemi Floor Mats
    |_ Gen 3 Hemi Oil Squirter Plug
    |_ Hemi 5.7 / 6.1L Power Packages
    |_ Hemi 5.7 and 6.1L Valve Covers
    |_ HEMI Drive Shaft Loop
    |_ Hemi Serpentine Belt Conversions
  |_ Intake Manifolds->
Engines->
Exhaust Components->
Exterior Vehicle Components->
Fasteners->
Fire Equipment->
Floor Mats->
Fuel Injection Systems
Fuel System Components->
Gaskets->
Gauges->
Gear Venders Overdrive Units
Ignition Components->
Lift Kits->
Lowering Kits->
Nitrous Kits->
Race Car Bodies->
Race Wear and Accessories->
Radiators and Components->
Rear End->
Roll Cages and Accessories->
Seats and Custom Interiors->
Shocks->
Spark Plugs->
Striker Viper heads Return
SuperChargers->
Suspension Components->
Tech Help
Throttle Bodies->
Tires->
Traction Components->
Transmission Components->
Tuning and Controllers->
Turbocharging->
Valvetrain Components->
Viper
Water Pumps->
Wheels->
Wideband Monitoring Systems->
Wiring harness and Accessories->

Customers

Brian A.

Brian A.

The 408 engine runs strong, put on dyno 405hp with 415tq N/A not shabby.. also was on 22" wheels with those numbers est. 500-525 @ crank. Thanks so...
Read More ->


Brian R.

John!! Got my Viper back together, dyno tuned. Super happy with the results of your work!! Gained 112 RWHP and 107RWTQ!!!!! More at the crank. Sounds...
Read More ->


Ken L.

John, Thanks for all your help. I wish I had known about you before I ordered the rest of my stuff! Thanks, Ken
Read More ->


Hannu O.

Hannu O.

thank you very much from Finland!
Read More ->


Ian A.

Ian A.

I wanted to thank you for all your help and support, for being so patient and for being a good, honest person and especially so professional....
Read More ->


Colton H.

Colton H.

"Johns the man, bought a 410 package from him years ago after I got back from overseas. The caveat I gave John was that it had to pass Californian...
Read More ->


Matt G.

I just want to say thanks for all that you have done for me, because over the weekend I was the fastest R/T out there with no power-adders and still...
Read More ->


Bruce P.

Bruce P.

John, you have been so prompt and helpful. Take care my friend and thanks again. I'll be back. Bruce
Read More ->


Robert M.

John, Thank you for all you have done, From your previous email responses, you seem to be old school, a man of his word. Thanks again John for...
Read More ->


Ricky H.

Ricky H.

Thanks for everything John. The headers are great !
Read More ->


Derek B.

Derek B.

Great Personalized service. Derek
Read More ->


Robert S.

Robert S.

426 Hemi Cuda
Read More ->


Billy W.

Billy W.

Dakota R/T 408
Read More ->


Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
Read More ->


Harold R.

John, Thanks for the great customer service! Harold
Read More ->


Steve B.

Steve B.

Thanks for the help with my 426 stroker.
Read More ->


Kyle M.

Kyle M.

John, I am very pleased with the brake conversion. The kit was very easy to install and I didn't have any problems and look very good as...
Read More ->


Barbara H.

John, Thanks again for making Colton's dream come true! The truck is in the body shop, the cowl hood arrived and the new 408 engine you built is...
Read More ->


Dan B.

Dan B.

Dakota R/T 408, Thanks for everything! Dan https://www.youtube.com/watch?v=wZekmXKYXA4
Read More ->


Mike M.

John's very honest, something that's hard to find these days. This means he'll tell you the truth and you may not want to hear it. LOL. The best...
Read More ->


Bob F.

Bob F.

Plymouth 426 Hemi
Read More ->


Jim W.

Jim W.

Thanks for the fast parts service and Great cylinder head porting! Jim
Read More ->


Robert S.

Robert S.

Great parts and service! Robert
Read More ->


Bill S.

Bill S.

Thanks John, 426 Hemi stroker 588 https://www.youtube.com/watch?v=1dJdt0ZFzjU
Read More ->


Taylor M.

Taylor M.

Thanks a lot John !
Read More ->


5.7 / 6.1L Hemi Valvesprings

Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. It does absolutely no good to install a cam that will perform up to 8,000 rpm if you do not have the correct springs. Use the only valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift. Our Hemi valve springs are offered in single and dual styles to meet their cam requirements.

Valve Springs, Single, 1.055 in. Outside Diameter, 313 lbs./in. Rate, 1.085 in. Coil Bind Height, Set of 16
 
Note-Fits Hemi V8 Modular 5.7L and 6.1L
 
Contact Southeast Performance for details and pricing.



Parse Time: 0.192 - Number of Queries: 256 - Query Time: 0.046136596069335