Skip White Performance - We have the best prices you will ever find for aluminum heads, rotating assemblies and strokers
Skip White Performance
1910 Brookside Lane
Kingsport, TN 37660

Mon.-Thurs. 8a-7p EST
Friday 8a-3p EST
Sat 10a-3p EST
(seasonal; call to confirm)

5 star rating
272,950+ reviews!

 423-722-5152

AFR CHEVY BBC 496 555 572 MAGNUM HEADS 345cc 121cc FULLY BUILT # 2110-1 HR

Available

$2,864.00



Product Information

UPC352592591497
Product TypeShipped Product
Number of reviews 0

FOR BBC CHEVY BIG BLOCK ENGINES
AFR 345cc RUNNERS 121cc CHAMBERS MAGNUM ALUMINUM HEADS.
AIR FLOW RESEARCH

 photo BBCAFR1.jpg

This sale is for a fully assembled set of heads (2 heads).
Important note.

Our user id is: skipwhite, and our store name is whiteperformance1. You may have noticed other sellers using a similar name offering similar products. These other sellers have capitalized on our name as we see it, and many customers searching for us will inadvertently find them, thinking we are one in the same company. There is only one "Skip White." We are the original premier seller under this name since approximately 2003. We have no other names, nor are we associated with any other company regardless of the similarity in the name or location. Our official company name is Skip White Performance. Please see the article in the lower part of this ad for a more detailed explanation.

 photo BBCAFR3.jpg

The springs in this setup operate with hydraulic roller cams up to 650 lift.

READY TO INSTALL.

 photo db9cff60-f84a-4620-bf4f-4eecfb4ddf62.jpg

This sale is for the a set of BBC 345cc heads setup for hydraulic roller cams. We suggest using these heads on setups coupled with cams in the 580-640 lift range. These heads will most likely prevail best on 496 and larger cubic inch engines.

Important note.

These heads are not suitable on 396, 427 or 454 engines that have compression below 10.5:1 Calculate your compression ratio before purchasing. These heads are well suited on 496 and larger bbc engines. The compression required would be 10:1 or higher. Slightly less would be ok.

Accessory Bolt Holes Drilled

Yes

CNC-Machined Combustion Chamber

YES

CNC-Machined Exhaust Runner

PARTIAL WITH CNC BOWL BLENDING

CNC-Machined Intake Runner

PARTIAL WITH CNC BOWL BLENDING

Combustion Chamber Style

Heart

Combustion Chamber Volume (cc)

121

Cylinder Head Finish

Natural

Cylinder Head Material

Aluminum

Cylinder Head Style

Assembled

Damper Spring Included

Yes

Exhaust Port Location

Raised .375

Exhaust Port Shape

D-SHAPED

SPRING TENSION

STD TENSION 140lb SEAT PR. 406lb OPEN AT 6.50 LIFT. #8016

Exhaust Valve Angle

23

Exhaust Valve Diameter (in)

1.880 in.

Exhaust Valves Included

Yes

Guideplate Pushrod Size

5/16 in.

Guideplates Included

Yes

Heat Crossover

Yes

Intake Port Location

Standard

Intake Port Shape

Rectangular

Intake Runner Volume (cc)

345cc

Intake Valve Angle

23

Intake Valve Diameter (in)

2.300 in.

Intake Valves Included

Yes

Lock Style

10 degree

Locks Included

Yes

Machined for O-Ring

No

Maximum Valve Lift (in)

Approx. 0.650 in.

Number of Springs Per Valve

Dual

Oiling Style

Through pushrod

Outside Diameter of Outer Spring (in)

1.550 in.

Quantity

Sold as a pair.

Retainer Material

Chromoly steel

Retainers Included

Yes

Rocker Arm Nut Thread Size

7/16-24 in.

Rocker Arm Nuts Included

No

Rocker Arm Studs Included

Yes

Rocker Arms Included

No

Spark Plug Style

Angle plug.

Steam Holes Drilled

No

Valve Cover Mounting Style

Perimeter bolt

Valve Guide Material

Bronze


You can reduce your engine weight by around 100 lbs. with the use of aluminum heads. You can also increase your power up to 250hp over an OEM 454 engine, depending on choice of cam and intake manifold. Compression ratio must be approx. 10.5:1 or higher on 427 and 454 engines. 496 or larger engines can get by with less compression but no lower than 10:1.

Official Dyno Report with these heads, our new Brawler 1050 carburetor, .566/.566 Comp Cam, single plane intake, and MSD distributor.

bbc 566/566 afr brawler dyno photo 0d40228d-1128-4c6d-9a63-764c78e4c2de.jpg

bbc 566/566 afr brawler graph photo dc52c8d9-16a0-4396-b8ff-38b5ec321fee.jpg

A final note...Skip White Performance...About Us

I'm sure many of you have noticed there are 2 high performance engine builders in Kingsport, TN with similar names, leading to a great amount of confusion.

We are Skip White Performance, NOT White Performance and Machine.

Due to the name similarity, many customers looking for us online inadvertently find them, thinking we are the same company. Definitely not...there is no connection between the two companies. We don't have a problem with free enterprise (competition). However, when the competition builds their foundation on such things as a name similarity and their supposedly long history of being in business, then we think it's about time we set the record straight.

We have owned White Performance since 2003, with the exception of the machine shop, which was owned by Fred White at the time. He continued to operate the machine shop and build engines for us while we continued selling online under the user ID of skipwhite and the store name of whiteperformance1.

Due to their limited production capability and many disagreements about the engine and head building process as well as workmanship, we opted to open a full scale machine shop of our own a few years later. Fred White began competing against us even though our contract had a non-compete clause in it.

As our business grew, we opened a second, much larger warehouse and machine shop around 2011, located on Brookside Ln. in Kingsport TN. By putting heart and soul in this company, we have become the number one street rod engine builder in the nation.

Fred sold his shop to an investor in 2016 and the new owners continue to reap the benefits from this confusion between the two shops. This investor lacked any knowledge of this industry. They continue to use the White Performance & Machine name. Contrary to what is posted on their website, Fred White is no longer associated with the company in any way. Their main spiel in advertising is, "In business since 1979," when in fact, we purchased the White Performance company in 2003, with the exception of the machine shop.

All in all, we have been in this business going on 17+ years. Skip White's passion has been owning and building street rods for 47 years on a personal level. The knowledge he has gained over time has allowed him to venture into this business and succeed to a very high level.

The great pretenders continue capitalizing on our success due to the name similarity, but have been degrading our reputation. We have been getting calls nearly on a daily basis from people that now realize there are two shops in this town with very similar names. Customers complain of serious problems in getting their orders in a timely manner from them. They think they purchased their cylinder heads from us. Due to the confusion, there is an increasing amount of negative feedback that is affecting our name within the street rod community, when in fact we have a near perfect reputation in this industry. We have an "A+" rating with the Better Business Bureau and we have maintained the A+ rating for many years.

FAST FORWARD TO PRESENT DAY...We have become the largest street rod engine builder in the nation. Our engines, rotating assemblies, and cylinder heads are built to very high standards and shipped to our customers in a timely manner. We are a premier seller on with a positive feedback score of well over 206,000 and growing, as compared to our competitor’s score of approximately 24,000.

Our engines are custom-built to our customers' specifications and are shipped in approx. 2-5 weeks, perhaps sooner, depending on the season. Our rotating assemblies usually ship out in about one week or less, and our heads ship in about a week or less.

    • We are not responsible for collateral damage caused by the use of this product.

    Customer Reviews

    This product does not have any reviews yet.