98MNBZ28

iTrader: (21)

My car currently have Pacesetters and they look terrible so I'm looking to upgrade. Now my car is just for street fun so performance isn't a big factor, I'm just looking for something that'll hold up over time. Both companies offer stainless headers but TSP are 304 and LPP are 321. I guess my question is are the different grade factors of the stainless used relevant? I'm in Florida.

jlpz

iTrader: (8)

The LPP headers are stepped they go from 1 3/4 to 1 7/8..
TSP headers are 1 3/4 and are not stepped.
as far as 304 vs 321 stainless steal I really don't know much about it. But I assume 321 would prob be better in fatigue strength and temperature factors. someone else might chime in on that area..

98MNBZ28

iTrader: (21)

What are the benefits of stepped headers?

myltwon

iTrader: (1)

Stepped means that it goes from a smaller diameter primary into a larger one using a smooth transition.

The TSP will be a 1 3/4" (1.750") diameter primary from flange to collector, whereas the LPP headers will begin as a 1 3/4" (1.750") primary then increase in diameter to 1 7/8" (1.875") from the remainder of the primary and then into the collector at that size.

Benefits will include but not be limited to: larger exhaust potential/power potential, smooth transition to a larger diameter for improved flow characteristics, plug/bolt access of a smaller diameter primary header, etc.

za355tx

iTrader: (108)

The LPP headers have a better scavenging collector in the way it's built and they use a merge spike as well. LPP's are also made in the USA. I know that doesn't matter to some but it means everything to others.

Catmaigne

iTrader: (6)

321 handles heat better and is less likely to crack under extreme conditions (boost, nitrous, etc). 304 is fine for a mild build though.

98MNBZ28

iTrader: (21)

So if my future plans only consist of heads, cam, intake and possibly rebuild when necessary, TSP would be best?

myltwon

iTrader: (1)

Just remember whatever power you think you'll be satisfied with is likely to be much higher than you thought.

I remember thinking all I'll ever want is nitrous, then just a cam, then just a h/c 383, now it's gone off the deep end. For next build planned on picking up a used P1SC, then I said well if I'm going to go through the trouble of building a motor for boost then why opt for a head unit I'll max out of the gate. Then I looked for used D1SC kits, hmmm not much cheaper than new and often incomplete. Oh wow an F1A kit is barely more than a D1SC kit new.

If there's one thing I've learned from modding cars, plan for the worse and overbuild because there's nothing more annoying than buying the same part twice because you cheaped out the first time.

moehorsepower

iTrader: (3)

What mylt said, they are "suppose" to, when we had the shop one of our customers went from straight to stepped headers, on the Dyno, it did not make 1 lb ft of torq or 1 horsepower difference, but this is not to say in another build it would make some gains.