x pipe or an H pipe

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May 2, 2016 | 09:26 PM

Trent Racer

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x pipe or an H pipe

i want to know the pros and cons of the x pipe and h pipe and if any of you guys have seen power gains or more low end torque

current exhaust: Longtube headers (flowtech) true duals no crossover pipe gutted cats 12 inch glasspacks dumped at the rear axle

and this is a 1989 f250 with a 351w

May 2, 2016 | 10:55 PM

whisler

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From: Northern Kentucky

I have the same truck with the same engine and shorty headers. I'm running duals with no cats and an H pipe. Seems to pull well for me.

May 3, 2016 | 09:44 AM

LARIAT 85

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From: Florence, SC

It was explained to me that the H-pipe helps with low-end torque and produces a deeper, classic muscle car sound. The X-pipe helps more on top end horsepower and produces a raspier, modern exotic car sound.

After running a true dual exhaust system (a separate exhaust pipe running from each header) since about 2009, a friend in the exhaust business convinced me to install a crossover pipe, or "H-pipe" between the two exhaust pipes. So I went ahead and did it, not expecting much difference.

To my surprise, the H-pipe made a VERY noticeable difference in my truck. Driving away, I felt the difference immediately. Although throttle response was always excellent with this truck, the H-pipe greatly improved low end power; I can actually feel the difference in the throttle. The engine seems to "breathe" better, as in I can accelerate MUCH easier and faster with less throttle pressure than before. The improvement feels like I fixed a sticking brake, or like I shed 500 pounds off the truck!

An added bonus came after I got home and got out to inspect the H-pipe location with the truck at idle: the exhaust note is now much deeper, much STRONGER. It now sounds like...a 5.0 Mustang!

May 3, 2016 | 09:55 AM

'89F2urd

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Neither. Long tubes into a y is what maximizes torque production, and fitting x or h pipe somewhere on your truck is nearly impossible to do in a clean fashion.

May 3, 2016 | 12:33 PM

LARIAT 85

Cargo Master

Joined: Dec 2004

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From: Florence, SC

Quote:

Originally Posted by '89F2urd

Neither. Long tubes into a y is what maximizes torque production, and fitting x or h pipe somewhere on your truck is nearly impossible to do in a clean fashion.

I don't know about the Y-pipe "maximizing torque production" but the H-pipe was welded in between the transmission and the [Flowmaster] mufflers, on the passenger's side right past the door on my truck. I am running dual exhaust with a separate muffler on each pipe.

May 3, 2016 | 02:07 PM

'89F2urd

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Y pipe = low end - mid range hp

X/h = mid-top end hp

Duals = worthless top end

Y pipe is best option for maximizing scavenging at low - mid engine speeds. It also takes a lot of rpm to exceed the capabilities of a good y.

May 3, 2016 | 02:44 PM

Motorhead351

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Stock engine or mild, Id do an x or h for sound characteristics, not power gains.

Y pipe is what I run, into a single pipe, weight savings over duals and can sound ever but as good.