RoastEmSS

Numbers in sig, i'm wanting to go with 2.5" TDs for clearance and noise with magnaflow 4x9s. My quesiton is will 2.5" rob very much, if any power over 3" on my setup?

senicalj4579

iTrader: (41)

well by the looks of things your making 447hp? if so 2.5" duels will be more than enough. you will not be robbed any power untill you start making about 500 hp. is that 3" a single?

NHRAMAN

iTrader: (1)

2.5" is enough for 500 hp it seems.......I am gonna change out my stupid 3" Y-Pipe for maybe even 2"......into 3" over axle........I don't go racin' everyone in sight with this car. So sick of hitting every damn bump and crack.[lowered 1-1/2"]

transAm-98

iTrader: (1)

3"

GuesDog

I have had both of them, and had a similar setup on the last motor and found that the 2.5 made more torque and about the same horse and the 3 inch did, don't kill your ground clearance for nothing...

BirdmanLS1

iTrader: (3)

2.5 is plenty.

Dex

iTrader: (5)

DreamState23x

iTrader: (4)

If I were to do mine again I would use 2.5 inch, and dual 2.5 inch pipes is plenty enough for 500+HP.

lsx24

iTrader: (45)

jmm98LS1

iTrader: (28)

You're probably on the higher end of what 2.5" duals will support, but I too think that it will be enough. By the looks of your sig, you're lowered enough that 3" would be a major clearance issue with 4x9 magnaflows.

jlashley2001ss

iTrader: (5)

yeah go with 2.5"!! You will make more torque with 2.5.

bjamick

iTrader: (31)

I would go 3" personally but thats just .02

KurtRardin

iTrader: (11)

I am so sick and tired of my LM and catted Y. I really want to go with some 2.5 true duals out the back. If I supplied my own mufflers, x pipe, tips, and possibly cats, how much do you think it would cost to have something fabbed up out the back with some wingnuts on a flange at the axle?

Ping King

iTrader: (20)

if youre sub 500 i would do 2.5's. However a competant exhaust fabricator should be able to make a 3 inch system tuck. I fabbed a system that was 3inch on a friends h/c car. He was lowered with a pro kit and never scrapped his exhaust ever.

KurtRardin

iTrader: (11)

i am very sub $500. I was hoping someone would say the parts and labor (minus the mufflers, x, and tips) would be sub $250.

KurtRardin

iTrader: (11)

what might be the cheapest and smallest mufflers to go with?

Ping King

iTrader: (20)

sub 500 Hp lol. You could do duals for 500 bucks easily.

KurtRardin

iTrader: (11)

whats the point, other than to go with 2.5", if it cant be done cheaper than TSP?

KurtRardin

iTrader: (11)

sorry. I understand now, lol. Yeah, i had 2.5s on a H/C big block pontiac. Just fine. What kind of price do you think i should look for?

goodrich969

iTrader: (9)

I like 2.5" because it holds a good amount power and it gives better clearance if your lowered.