DNA Motoring CYLH-SBC-350 Aluminum Bare Cylinder Head Compatible with SBC 302/327/350/383/400
Condition: New
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Availability:
In Stock.
Arrives
Friday, Aug 1
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Features
- *Compatible With14-Present Ranger with 5Ft / 61" Bed (Fits NON USDM International Version Only)
- *DimensionIntake Valve Diameter: 2.020" | Exhaust Valve Diameter: 1.600" | Intake Port Volume: 200cc | Combustion Chamber Volume: 68cc | Intake Port: Square | Exhaust Port: Square | Spark Plug Angle : Straight
- This head is 200cc intake runner with a 68cc combustion chamber, 68cc combustion chambers improve performance and retains stock compression on 1970 and earlier
- Combustion Chamber Volume: 68cc ; Intake Port: Square ; Exhaust Port: Square.High grade aluminum, bronze valve guides, hardened seats, advance port design for greater air flow.
- Lighter than Iron Heads. Each Head weighs 10.33kg ; 3-Angle Valve Seat ; Spark Plug Angle : Straight
Description
Increasing your engine's efficiency is a major way to improve performance and horsepower; the addition of performance-oriented aftermarket heads can greatly improve your engine's output by enhancing airflow and combustion efficiency.
Manufacturer: DNA Motoring
Brand: DNA MOTORING
Model: CYLH-SBC-350
Item Weight: 21.4 pounds
Package Dimensions: 21.9 x 10.5 x 7.7 inches
Country of Origin: China
Item model number: CYLH-SBC-350
Exterior: Bare
Manufacturer Part Number: CYLH-SBC-350
Position: Front
Date First Available: September 20, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Aug 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Out of the box, I was throughly impressed. Packed very well, no damage. Using a Machinist's Straight Edge, I checked the deck surface; spot on. All guides feel fantastic with the valves I purchased seperately. I lapped every valve to check the seats; once again......spot on. Ran a tap through every threaded hole; no issues. Very little casting flash inside the runners. Not required by any means but I spend some quality time with a Christmas tree burr and cartridge rolls just below the seat into the runners (smooth the transition) and smoothed the aforementioned casting flash. These heads show a ton of potential. I can't wait to get them on my SBC build!
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Reviewed in the United States on April 17, 2025 by Ker
Watch the prices as they fluctuate wildly, but these can be anywhere from a good deal to an amazing deal. That being said, they won’t be flat, so expect to surface them. For budget builds, you won’t find a better bang for your buck.
Reviewed in the United States on May 9, 2025 by Steve Partridge
Nice heads! I blew a head gasket on my 67 Corvette and decided it was time to upgrade to aluminum heads. These heads are the same casting as AFR “As cast” for 1/3 the price. Of course, you have to add valves, springs, valve guide plates, and seals, but they are still a good buy if you do the assembling. They needed quite a bit of flashing clean up. Using cartridge sanding wheels, I was able to get them smoothed out for flow and very clean. I put new springs on and lapped the valves. Installed height was 1.70 just as stock. They were incredibly flat when the arrived! Less than .0015 across in every direction. I got long tube headers, too, as the original exhaust flanges were rotted away. OMG! The car picked up a ton of power! Just amazing. It is just mind boggling how much more power it has with these heads and headers. All the way through the RPM range. You really notice it above 3000 rpm, though. The cam comes alive around there, so these heads really breathe and let it develop so much power above 3K! I wanted to do an LS3 swap, but now, I can wait, as these heads and headers combined to make the Mighty Mouse motor put out big block power.
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Reviewed in the United States on October 28, 2022 by Joe
Would give 5 stars except this set could have had more attention paid to port flashing clean up in runners and burrs left on inside chamber at spark plus tap nothing that a die grinder and 5 minutes cleaning didn't fix. This is my 2nd set of DNA heads and 1st set works well on the 427cid stroker engine. I am hoping these will work as well on 383 cid stroker. Hoping to produce a little over 400hp should be no issue if these perform as well as last set.
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Reviewed in the United States on August 15, 2020 by Lee
These are very nice bare heads. After inspection of both heads....there were no shipping damage. Casting were very clean for China head. I would buy again from this ex p erience
Reviewed in the United States on December 28, 2024 by anthony plese
Expect to need the deck machined flush if you buy these. Mine were both .007" warped. So almost 100% out of spec (.004 max). The intake ports aren't a complete match/centered for a FelPro intake gasket (who do you think knows their stuff better?) But I'll be taking up the offset with the oversized holes in the gasket hopefully plus utilize some RTV. These may also potentially need a valve job, time will tell. The initial lapping held alcohol with no visible leaks though I did not let it sit overnight. These heads get 3 stars b/c of the price, you can get the machine work done and build your own valve train to match your application. And these heads will still be probably half the price of the cheapest fully assembled aluminum heads. Expect to have to get aligning spring shims based on your own spring choice. Plus you will have to get +.100" length valves for an accurate spring assembled height. The push rod holes are nowhere, and I mean nowhere, close to being centered on the pushrod but don't rub so maybe we will go with lightening weight. These heads look fantastic out of the box, but you should check and verify deck flatness. You are getting what you pay for: Chinese quality aluminum cast heads; cheap, not perfect, needs some work to be great. Never get these pre assembled like you find sometimes, use quality valve train components, you'll be glad you did. And even with all that, you're still ahead when it comes to cost vs a high quality aluminum head already assembled : $1200+ for an individual head. Overall 3 stars... for now until I get the engine running.
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Reviewed in the United States on November 11, 2022 by Luke F.
Note. These require .100 longer valves even though it says direct replacement. Everything else was great. I took them to my machine shop guy to check flatness and seats and it was solid.
Reviewed in the United States on May 27, 2024 by Amazon Customer
Love them hell of deal
Reviewed in the United States on February 1, 2025 by george karlie george karlie