bwarren337

I dont know much about heads but i will be putting a ms4 cam in my ls1 and was wondering if i needed to do heads or are stock ones ok....if i need to replace heads does anyone have suggestions on which heads to get for the ms4 cam...thanks

henryz28

Heads are not a must; but ported or aftermarket heads would provide more hp. I would defiantly be sure to have at-least an ls6 intake and depending on what injectors you have I would think about swapping the injectors. A mail order or dyno tune should be done also.

bwarren337

I have a ls6 manifold on already..what injectors would you recomend getting to suport the ms4?

henryz28

What year is your car? I know some years came with the ls6 intake; If you have one of those then you more than likely will have larger injectors too and you'll be OK, but if you added the ls6 intake I would go with a 30lb ford svo or a 36lb if you plan on further mods down the road. 30lb would be fine if you don't plan on doing more mods later, but if your going with new injectors I would do 36lb;they will work fine now and provide more fuel later.

bwarren337

The car is a 1999. I put the ls6 manifold on there.. do you know of any good sites to get 30lbs or 36lbs injectors from...

Chrome383Z

thunder racing, speed inc, texas speed all good places.

Heads I would either go with AI 243s, or AFR 215. I wouldn't mess with any of the others, Trick Flows require (debatable) aftermarket rocker arms so I'm not a fan of them. Thunder sells a shim kit to use stock, but TEA still claims it's not a great idea and the guides will still wear faster then normal.

I tend to favor either of those heads (AI for budget, AFR for $$$)