justinlamanna

I am looking at buying a pair of these complete and was Interested to see ifnyone Has purchased a completeand set?

Anyone's feedback would be appreciated to help make my decision, thanks.

Frans96ss

I just ordered 5 sets last week for builds we are doing here. Feel free to give me a call if you need a set of have any questions.

rattt g

carry from performance induction is over at mast now,
can not go wrong with his heads

mdaniel

How do the MAST heads compare with say, worked over stock LS7 casted heads?

Unreal

6 bolt, thicker deck, and a few other nice upgrades. If you can afford aftermarket they are better IMO. All Pro, Mast, PRC, Brodix, etc all make aftermarket LS7 heads.

justinlamanna

I called you this morning and left a message for you to call me.

0Louis @ LG Motorsports

If you want a boosted application, go with the MAST heads. If you are staying NA, stock ported will out perform them in every department.

The RHS is comparable to mildly worked stock heads.

Z06-TT

so are Worked RHS even better by your opinion??

rattt g

any flow numbers/dyno numbers to back that up

4GS7

Do the aftermarket heads still have offset rockers?

0Louis @ LG Motorsports

Not necessarily, but if you go solid roller, they are superior with the rocker design.

With the LS7 heads, you own them. So the cost of guides, a valvejob, and a good solid exhaust valve, you save from the RHS. If you start bare, its a toss up.



Yes, lots of both. When we are ready, we will share. We are not ready, and may not be ready for some time, but my customers can gain that knowledge should they pick a heads/cam package from us.

The MAST is basically a stock LS7 with a larger port volume, and the heads typically lack the velocity due to the large port. Who cares if its got a blower on it or twins. I wouldnt use ANY other head if I were planning on making 900+. NA? Not so much.

Yes.

edmundu

Lou,

Thank you for the candid insight!

Z06-TT

ao Lou,

for Boost. would you buy the RHS or Mast??

ls3lsxz

im wondering the same which one is better Mast or RHS ?

tim414

I think he was saying MAST for FI ("The MAST is basically a stock LS7 with a larger port volume, and the heads typically lack the velocity due to the large port. Who cares if its got a blower on it or twins. I wouldnt use ANY other head if I were planning on making 900+. NA? Not so much." quote from Lou in one of these here threads)

My take anyway...

justinlamanna

I just had MAST Heads and their cam installed at FJ Performance out of Pittsburgh, PA. with Kooks headers, Killer Bee 2 and FJ's tune it dyno'd:

STD 592HP / 527TQ
SAE 579HP / 516TQ

the dyno graph shows the car needs a bigger intake and/or bigger exhaust.

FRDnemesis

I've been talking with Mast and getting ready to purchase. Which Mast Cam did you go with? I'm looking at the 246/260, 659/666 cam.

BigMike NY

Cary is a genius, I purchased one of the (if not the last set of C5-R) heads from ETP before he left. The heads are a marvel! MAST heads are extremely good heads! Best of luck in your decision making...

Frans96ss

What are the cam specs? What kind of dyno?

FRDnemesis

With those numbers, I'm going to speculate that it is the same cam as I referenced above in my previous post and what was tested in this article:

http://www.mastmotorsports.com/2010/..._LS7_Heads.pdf


Which is very similar to the Black Widow Cam.

-jeff