Mega-flo

Mega-flo Harley-Davidson Engine and Cylinder Head blueprinting and related machining. An American Independent Since 1980.

Harley Davidson high performance cylinder heads, engines, shortblocks, engine related machining.

Now let's not make a habit of this!Some S&S Super Stocks were sent in for "a little" hop up work and needed some special...
06/23/2026

Now let's not make a habit of this!

Some S&S Super Stocks were sent in for "a little" hop up work and needed some special attention before the real job could begin!

Definitely not my first rodeo here. So, after some straightening, grinding and prep, I rustled up my welder Scott Kreutz who laid down some metal, and I took it from there.

Have Die Grinder-Will Travel!

TC 88 to 95. They're still out there!A few odds and ends from a classic style and solid 88 to 95 overbore top end to wha...
06/18/2026

TC 88 to 95. They're still out there!

A few odds and ends from a classic style and solid 88 to 95 overbore top end to what was a low mileage all-stock 2005 FXD power plant. Now equipped with my SS2 cylinder head package and a few added extras, a gearcase upgrade to hydraulic support plate and a set of Andrews cams running 4 degrees advanced on the timing, Fueling HP+ lifters and some Comp taper top pushrods! This build is for a another one of my many second-generation customers out of Western PA!

46 Years of full-time American V-Twin engine and cylinder head building behind every cut!

Some MEGABUILT Twin Cam 117 top end.A nice set of HD SE head castings fully modified and blueprinted to my ProPrep 2 spe...
06/11/2026

Some MEGABUILT Twin Cam 117 top end.

A nice set of HD SE head castings fully modified and blueprinted to my ProPrep 2 specs with .650 lift endurance springs, Iron Alloy guides and oversize intake and exhaust valves, along with some S&S 4 1/8 bore jugs fit up to a set of CP forged pistons.

1992 80' Evolution Here are a couple of pictures of a super nice set of 1992 castings that are ready for assembly. They ...
05/30/2026

1992 80' Evolution

Here are a couple of pictures of a super nice set of 1992 castings that are ready for assembly. They are all done up to my E80 SS2 port and blueprint package with a few optional details added in. I'll put up more detailed pics of this set at a later date, but they turned out both mechanically AND aesthetically so on point, that I had to share at least a couple right away!

Have a great weekend! Jim.

2010 XR1200. Full and complete custom port, seat and chamber work. Oversize seat inserts, Manley Gen II custom oversize ...
05/22/2026

2010 XR1200.

Full and complete custom port, seat and chamber work. Oversize seat inserts, Manley Gen II custom oversize valves, Nextek beehive springs, cc'd and decked. Throttle Body runners reworked and matched too! Returned with copies of the flow results and the most complete blueprint assembly spec sheet in the industry!

Locked, loaded, ready to rock and on their way to the Doc!

Over the hump and well along the way, I'm just about finished with some XR1200 castings equipped with a custom port/valv...
05/20/2026

Over the hump and well along the way, I'm just about finished with some XR1200 castings equipped with a custom port/valve configuration developed for Corey and the crew at Doc's Performance Tuning in Florida. Maybe I'll get a few more detailed pics of it up before shipping time. But for now, it's back to work!

May 08, 2026.My 46-year anniversary in the business and some Shovelhead for your weekend viewing pleasure, because it wa...
05/08/2026

May 08, 2026.
My 46-year anniversary in the business and some Shovelhead for your weekend viewing pleasure, because it was in the Shovelhead era that it all started for me as a full-time independent!

This 93 incher is a crankpin up and rocker shafts down complete true blueprinted assembly and just as with my cylinder head builds/blueprints, the customer will receive a copy of all the internal running clearances, endplays, balance factor etc. You know it takes very special customer to sneak a transmission in here for the same treatment, and this particular customer did succeed in doing so!

But then, ALL of my customers are special and on this special day thanks to ALL of them, past, present and future! It's been a great ride that's still got a long way to go!

Some Moldstar jewelry for these MEGABUILT S&S B2 castings and a few other tricks to follow!
04/24/2026

Some Moldstar jewelry for these MEGABUILT S&S B2 castings and a few other tricks to follow!

I'm channeling Mackie on these early STD Panheads!
04/01/2026

I'm channeling Mackie on these early STD Panheads!

What a long, strange trip it's been
03/30/2026

What a long, strange trip it's been

Address

268 Cornelius Road
Portersville, PA
16051

Telephone

+17243683955

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