z28_YOU_HO

iTrader: (7)

What would be the benefits of using a 4" merge over a 3.5" ?

Trying to figure out which was to go. The car is going to be stock cube HCI only

HCI2000SS

iTrader: (2)

The benefit is better flow with equals more power. The 4" is the better choice. This is what I run on my HCI LQ9, and it made a noticeable difference over the crappy Pacesetter merge

z28_YOU_HO

iTrader: (7)

Sweet just ordered the 4" merge and 4" cutout from Summit

gsxkid

iTrader: (2)

Could you post some pics when you get it put on?

z28_YOU_HO

iTrader: (7)

Sure thing

Kingc8r

iTrader: (21)

You made the right choice

LilJayV10

iTrader: (39)

On my H/C/I car I had 1 3/4 LTs, 3 inch y pipe in the flowmaster 3in-4 out merge, 4inch pipe to the back seat area, 4 inch cutout and back into the SLP dual/dual muffler and only picked up like 4hp with the cutout open. I was kinda surprised.

JRENIGAR

iTrader: (37)

I had similar results with a 3.5" merge and cutout setup like yours into the stock T/A catback when I was cam n ported heads. It made 375rwhp open and only lost 7hp when closed. Sounded awesome but thats about where the benefits ended. I swear from a roll it pulled harder with the cutout closed.

sillysspeed

iTrader: (21)

Mine only picks up .05 at the track with the cutout open. Imo on a stock cube engine the 3.5 vs 4 merge is going be within a few hp at most

z28_YOU_HO

iTrader: (7)

I'll be picking it up after work so I'll report back with SOTP feel lol

z28_YOU_HO

iTrader: (7)

Got the 4" merge & cutout on today. Holy **** it is loud. Wayyy louder than my old 3" on the pumpkin. Sounds good with cutout closed. Sorry no vids of that. Luckily it's not my daily or I would go deaf in a week haha

Kingc8r

iTrader: (21)

I loved my Cutout setup here in Nazifornia. Quiet when needed and loud when I wanted to wake the dead. Best of both worlds