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- 1970-74 F-Body, Firebird/Trans Am, X-Body
1970-74 F-Body, Firebird/Trans Am, X-Body
Pontiac V8 1970-74 F-Body, Firebird/Trans Am, X-Body
Second-Gen, Sorted — 1970-74 F-Body, Firebird/Trans Am, X-Body for Pontiac V8s
The 1970-74 Firebird and Trans Am is the second-gen car before the bumper and floor changes, and it shares its exhaust family with the X-body Ventura. This is the widest F-body shelf Butler has, covering 2.5" and 3.0" systems, rear exit and quarter panel exit, with and without a crossover.
Everything here is Pypes Performance Exhaust: 16 gauge mandrel-bent 409 stainless, your choice of X-pipe, H-bomb H-pipe or no crossover, and Street Pro, Race Pro or Violator mufflers.
Browse 1970-74 F-Body, Firebird/Trans Am, X-Body Products
Items 1-30 of 33
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Description: Fabricated using the highest quality materials, 16 gauge, mandrel-bent, stainless steel pipe ensures maximum exhaust gas flow, which can significantly boost horsepower.
Item #: PYP-SGF40
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $732.41
Pypes 1975-81 2.5" F/X-Body Crossflow Muffler Crossmember Back w/ Hpipe Exhaust System (PYP-SGF940E)
Description: Pypes crossmember-back exhaust system — 1975-81 2.5" F/X-Body Crossflow Muffler Crossmember Back w/ Hpipe Exhaust System. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF940E
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $1,303.70
Pypes 1975-81 2.5" F/X-Body Crossflow Muffler Crossmember Back w/ Xpipe Exhaust System (PYP-SGF970E)
Description: Pypes crossmember-back exhaust system — 1975-81 2.5" F/X-Body Crossflow Muffler Crossmember Back w/ Xpipe Exhaust System. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF970E
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $1,294.09
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Hpipe Exhaust System. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF941E
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $992.74
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Hpipe Exhaust System RP. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF941RE
Condition:
New
Price: $1,126.17
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Hpipe Exhaust System SP. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF941SE
Condition:
New
Price: $1,124.25
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Hpipe Exhaust System Violator. Mandrel-bent 2.5" tubing, bolt-on fit, Violator mufflers.
Item #: PYP-SGF941VE
Condition:
New
Price: $1,122.31
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Xpipe Exhaust System. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF911E
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $989.43
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Xpipe Exhaust System RP. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF911RE
Condition:
New
Price: $1,203.23
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Xpipe Exhaust System SP. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF911SE
Condition:
New
Price: $1,114.95
Description: Pypes crossmember-back exhaust system — 1975-81 F-Body 2.5" Crossmember Back w/ Xpipe Exhaust System Violator. Mandrel-bent 2.5" tubing, bolt-on fit, Violator mufflers.
Item #: PYP-SGF911VE
Condition:
New
Price: $1,112.96
Description: Pypes crossmember-back exhaust system — 2.5" 67-74 F Crossflow w/X. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF70
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $732.41
Description: Pypes crossmember-back exhaust system — 2.5" 67-74 X-F Crossflow T304. Mandrel-bent 2.5" tubing, bolt-on fit, T304 stainless.
Item #: PYP-SGF70S
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $869.73
Description: Pypes crossmember-back exhaust system — 3" 70-74 X-F qtr exit w/X VL. Mandrel-bent 3.0" tubing, bolt-on fit, .
Item #: PYP-SGF13V
Condition:
New
Price: $626.39
Description: Pypes crossmember-back exhaust system — 67-69 2.5" X StreetPro. Mandrel-bent 2.5" tubing, bolt-on fit, StreetPro mufflers.
Item #: PYP-SGF60S
Condition:
New
Price: $602.65
Description: Pypes crossmember-back exhaust system — 67-69 2.5" X Violator. Mandrel-bent 2.5" tubing, bolt-on fit, Violator mufflers.
Item #: PYP-SGF60V
Condition:
New
Price: $602.38
Description: Pypes crossmember-back exhaust system — 67-69 2.5" X NO MUFF. Mandrel-bent 2.5" tubing, bolt-on fit, no mufflers.
Item #: PYP-SGF60
Condition:
New
Price: $542.21
Description: Pypes crossmember-back exhaust system — 67-69 F 2.5" X Race Pro. Mandrel-bent 2.5" tubing, bolt-on fit, RacePro mufflers.
Item #: PYP-SGF60R
Condition:
New
Price: $602.50
Description: Pypes crossmember-back exhaust system — 67-69 F BODY 3" QTR EXIT. Mandrel-bent 3.0" tubing, bolt-on fit, .
Item #: PYP-SGF63
Condition:
New
Price: $512.82
Description: Pypes crossmember-back exhaust system — 67-69 F BODY 3" QTR EXITSP. Mandrel-bent 3.0" tubing, bolt-on fit, .
Item #: PYP-SGF63S
Condition:
New
Price: $651.56
Description: Pypes crossmember-back exhaust system — 67-69 F BODY 3" RACE PRO. Mandrel-bent 3.0" tubing, bolt-on fit, RacePro mufflers.
Item #: PYP-SGF63R
Condition:
New
Price: $651.41
Description: Pypes crossmember-back exhaust system — 67-69 F BODY 3" VIOLATOR MUFF. Mandrel-bent 3.0" tubing, bolt-on fit, Violator mufflers.
Item #: PYP-SGF63V
Condition:
New
Price: $651.29
Description: Pypes crossmember-back exhaust system — 70-74 2.5" F-X w/X no muff. Mandrel-bent 2.5" tubing, bolt-on fit, no mufflers.
Item #: PYP-SGF11
Condition:
New
Price: $629.95
Description: Pypes crossmember-back exhaust system — 70-74 2.5" no X NO MUFF. Mandrel-bent 2.5" tubing, bolt-on fit, no mufflers.
Item #: PYP-SGF31
Condition:
New
Oversized handling fee applies to exhaust systems. Will ship ground only.
Price: $408.14
Description: Pypes crossmember-back exhaust system — 70-74 2.5" w/o X rear exit RP. Mandrel-bent 2.5" tubing, bolt-on fit, RacePro mufflers.
Item #: PYP-SGF31R
Condition:
New
Price: $534.90
Description: Pypes crossmember-back exhaust system — 70-74 2.5" w/o X rear exit SP. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF31S
Condition:
New
Price: $535.54
Description: Pypes crossmember-back exhaust system — 70-74 2.5" w/o X rear exit VL. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF31V
Condition:
New
Price: $535.27
Description: Pypes crossmember-back exhaust system — 70-74 3" w/X qtr exit RacePro. Mandrel-bent 3.0" tubing, bolt-on fit, RacePro mufflers.
Item #: PYP-SGF13R
Condition:
New
Price: $855.95
Description: Pypes crossmember-back exhaust system — 70-74 X-F 2.5 w/X RacePro. Mandrel-bent 2.5" tubing, bolt-on fit, RacePro mufflers.
Item #: PYP-SGF11R
Condition:
New
Price: $541.75
Description: Pypes crossmember-back exhaust system — 70-74 X-F 2.5 w/X rr exit VL. Mandrel-bent 2.5" tubing, bolt-on fit, .
Item #: PYP-SGF11V
Condition:
New
Price: $542.35
Items 1-30 of 33
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More About 1970-74 F-Body, Firebird/Trans Am, X-Body
1. Know which second-gen car you have
This is where most ordering mistakes happen, and Pypes prints the answer in its own product notes.
| 1970-74 F-body and X-body | the core systems in this section are listed as fitting 70-74 GM F-body cars, which covers Firebird, Formula and Trans Am plus X-body Ventura. |
| 1967-69 cars | Pypes directs those owners to the first-gen crossflow and quarter exit part families instead. |
| 1975-81 cars | the late second-gen car takes its own X-pipe and H-pipe part numbers, which Pypes calls out by number in the 70-74 listings. |
2. Crossover and pipe size
| X-pipe, 2.5" or 3.0" | the largest group. 2.5" suits a rebuilt 400 or a strong street 455; 3.0" is for a big-cube build and is offered with quarter panel exit. |
| H-bomb H-pipe, 2.5" | the deeper note, in 409 stainless with your choice of the three mufflers. |
| No crossover | straight dual rear exit systems in 2.5" for owners who want the split note or a period-correct car. |
| Muffler-delete | every crossover style is also sold with no mufflers. |
3. Exit style and tips
Tips are separate, and on a second-gen car the tip choice also changes the tailpipe routing.
| Straighter out the back | Pypes notes that adding the optional EVT58 or EVT59 tip sets lets the tailpipes exit out the back straighter than the standard routing. |
| Trans Am splitters | running EVT10 splitter tips on a Trans Am requires the matching tailpipe adapter kit, which Pypes calls out by part number. Order both together or the splitters will not mount. |
| Quarter panel exit | offered on the 3.0" X-pipe systems for a more aggressive look behind the rear tire. |
4. What feeds the system
These systems pick up behind the crossmember, so what is ahead of that point is a separate decision that still changes your order.
| With full-length headers | a 1 3/4" D-port set on a second-gen car finishes in a 3" collector and a 1 7/8" round port set in a 3 1/2" collector. Confirm which you have so the downpipe connection is right. |
| With Ram Air manifolds | a stock-appearance car needs downpipes to reach the system, and a manifold with an oversized 2.5" outlet pairs naturally with a 2.5" system. |
| Do not oversize one end | 3.0" pipe behind restrictive factory outlets gains you noise and nothing else. Upgrade the front and the back of the path together. |
5. Picking a muffler
| Street Pro | the quiet end of the range, and the one to pick if the Trans Am does long drives. |
| Violator | the loud-but-livable middle, and the most common choice on a second-gen car. |
| Race Pro | the loudest, and available on the crossflow systems as two mufflers in a single transverse casing. |
All of these are 16 gauge mandrel-bent stainless, bolt together at home, and carry a limited lifetime warranty. If your car is lowered or running a wide rear tire, mention that when you call so we can steer you toward a routing that will actually clear.
Not sure what your Pontiac needs?
Call our tech team at 866-762-7527. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.