I'm hearing that some after market intake manifolds for LS engines (like an '09 5.3L in a GM pickup) generally provides around a 20 HP gain.

I'm considering doing this and then getting a tune to tweak it all out, so what do you guys think is the best aftermarket intake to consider?

 

You should have the same intake as the tbss, thought those gains were only on the gen 3 trucks with the undersized intake... Unless youre talking a ported intake...

 

Looks like the best one for a stock LS engine would be the FAST LSXR 102mm (my OEM unit is the Trail Blazer SS, or TBSS) based on the testing found at - 20 LS1 Intake Manifolds: Tested!

Now, if I can just get a hold of some cash the wife doesn't know I have

If I get alot of extra horses I'd probably get myself in trouble.

This one should get me about an extra 20 horses. I'm not wanting to port heads and swap out the cam so this would be a nice little increase along with a good tune and some wide band O2 sensors for optimal efficiency.

 

If you dont plan to swap heads or cam then save money...your stock intake is plenty

 

the FAST LSXR 102mm can get about an extra 20 horse just as a bolt on with no tune (or, so they say)... so with a tune I should get a few more horses, so to me it's worth it.

Another reason is the TBSS that came stock is butt ugly!

 

Not worth the money to swap unless you really plan to use the intake to it's fullest.

To me it's an overpriced and over hyped intake to begin with.

 

Its not gonna gain you enough for how much youll spend unless you plans on heads and cam

Dont believe sales pitches

 

I'll change it just because the stock one is butt ugly!

There is dyno testing (by third parties not selling anything to anyone) to prove it will increase 20 horses on a stock engine, so that's icing on the cake when getting rid of the butt ugly OEM intake.

Besides, it's not like it's a lot of money or anything.

 

Most people drive with the hood closed.

 

Intake, tb, new fuel rails, fittings, new air intake


2000 easy spent for hardly any gain

Buy it and post up and youll see members tell ya told ya so