EXHAUSTFORGE
Fabrication bay interior with TIG welder flashing blue arc light, stacked mandrel bends on steel rack, overhead fluorescents cutting hard shadows across freshly welded merge collector
214 HP GAINED.
ONE EXHAUST.

2023 FORD F-250 6.7L POWERSTROKE · DYNOJET CHASSIS DYNO · VERIFIED 02/2026

SCROLL FOR PROOF
214 HP GAINED·304-GRADE STAINLESS·MANDREL-BENT TUBING·1.6MM WALL·98% WELD PENETRATION·DYNO-VERIFIED·TIG WELDED IN-HOUSE·CUSTOM DOWNPIPES·47 LB WEIGHT SAVINGS·ZERO BACKPRESSURE·RACE-SPEC FLANGES·3" MANDREL BENDS·214 HP GAINED·304-GRADE STAINLESS·MANDREL-BENT TUBING·1.6MM WALL·98% WELD PENETRATION·DYNO-VERIFIED·TIG WELDED IN-HOUSE·CUSTOM DOWNPIPES·47 LB WEIGHT SAVINGS·
01 / PERFORMANCE DATA

Numbers Don't Lie

DYNOJET VERIFIED · 2023 FORD F-250 6.7L POWERSTROKE

+214
HP
PEAK GAIN
STOCK HP
0 HP→0 HP
STOCK
FORGE
PEAK TORQUE
0 lb-ft→0 lb-ft
STOCK
FORGE
EXHAUST FLOW
0 CFM→0 CFM
STOCK
FORGE
BACKPRESSURE
0 PSI→0.0 PSI
STOCK
FORGE

All figures measured on a Dynojet 224xLC chassis dyno. Before measurements taken with OEM exhaust system. After measurements with ExhaustForge 3" full turbo-back system, no other modifications.

Close-up of TIG weld bead on stainless steel merge collector showing heat tint purple and gold oxidation patterns
TIG WELD DETAIL — MERGE COLLECTOR
Mandrel-bent stainless steel exhaust tubing installed on performance vehicle showing clean routing
INSTALLED FITMENT — 3" MANDREL BEND
Cross-section of 304 stainless steel exhaust tubing showing 1.6mm wall thickness and smooth interior bore
MATERIAL CROSS-SECTION — 304SS 1.6MM
02 / BUILD TYPES

What Are You Building?

Every build starts with a goal. Pick yours and we'll spec the right system.

Street performance car with aftermarket exhaust system installed showing clean chrome tips
SPF-01
Street Performance
Race car exhaust system with large diameter tubing and merge collector showing race fabrication quality
RCE-02
Race Application
Heavy duty diesel truck with emissions compliant exhaust system showing proper DPF routing
EMC-03
Emissions Compliant
Close-up of polished stainless exhaust tip showing mirror finish and sound-tuned muffler design
SND-04
Sound Only
03 / CASE STUDIES

Proof in the Numbers

STREET BUILD

2019 Subaru WRX STI

3" Turbo-Back, Equal-Length Headers

+
HP BEFORE
310HP
HP AFTER
389HP
TORQUE BEFORE
290lb-ft
TORQUE AFTER
358lb-ft
WEIGHT SAVED
18 lbs
SPL READING
91 dB

"Equal-length headers solved the EJ25 scavenging problem. Pulled power through the entire rev range, not just peak."

— Marcus D. — Portland, OR
Subaru WRX STI with aftermarket turbo-back exhaust system showing stainless steel piping
STREET PERFORMANCE
SOUND + STREET

2021 Chevrolet Silverado 1500 5.3L

3" Cat-Back, Resonator Delete, Dual 4" Tips

+
HP BEFORE
355HP
HP AFTER
402HP
TORQUE BEFORE
383lb-ft
TORQUE AFTER
426lb-ft
WEIGHT SAVED
22 lbs
SPL READING
96 dB

"Customer wanted the truck to sound like a truck. Resonator delete with tuned chambered muffler — deep at idle, aggressive under load."

— Tyler W. — Denver, CO
Chevrolet Silverado truck with dual exit cat-back exhaust system and polished stainless tips
SOUND + STREET
RACE / MAX POWER

2022 Ford F-250 6.7L Powerstroke

4" Full Turbo-Back, Custom Y-Pipe, 5" Tip

+
HP BEFORE
475HP
HP AFTER
689HP
TORQUE BEFORE
1,050lb-ft
TORQUE AFTER
1,380lb-ft
WEIGHT SAVED
47 lbs
SPL READING
102 dB

"The 6.7L chokes on backpressure. A properly-sized 4" system with a free-flowing downpipe unlocked 214 HP that was sitting in the turbo, strangled."

— Brent K. — Houston, TX
Ford F-250 Powerstroke diesel truck with large diameter 4-inch exhaust system showing turbo-back installation
RACE / MAXIMUM OUTPUT
READY TO ADD YOUR BUILD TO THIS LIST?

Tell Us What You're Running

04 / MATERIAL SPECIFICATIONS

Grade & Gauge

Every system leaves this shop to the same spec sheet. No shortcuts on grade or gauge.

MATERIAL GRADE
T304 / ASTM A240
304 Stainless Steel
WALL THICKNESS
Schedule 10 available for race
1.6mm (16ga)
TUBE DIAMETER
Mandrel-bent, no kinks
2.5" – 4.0"
WELD PROCESS
ER308L filler, purge-backed
GTAW (TIG)
WELD PENETRATION
Verified by cross-section test
98% minimum
FLANGE MATERIAL
CNC laser-cut, face-milled
3/8" 304SS plate
GASKET TYPE
900°F rated
Graphite composite
HARDWARE
Anti-seize applied at factory
Grade 8 stainless
HEAT TINT ZONE
Normal, not a defect
450–650°C at weld
FINISH
Ceramic coating available
Mill finish / polished
1.6
MM

Download Material Spec Sheet

Full PDF with grade certifications, wall thickness tolerances, weld procedure specs, and flange drawings. Used by shop owners and engineers before committing to a build.

NO SPAM. SPEC SHEET ONLY. UNSUBSCRIBE ANYTIME.

304
SS GRADE
900°F
GASKET RATING
98%
WELD PENETRATION
EXHAUSTFORGE · AUSTIN, TX · (512) 847-3290
Need it by Saturday? Call us.
EXHAUST FORGE / BUILD QUOTE

Get Your Build Quoted

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What are you running?

Year, make, and model. That's all we need to start.

What's the goal?

Pick the one that fits closest. We'll dial in the details.

Tell us about your setup.

Mods already done, boost level, power goal, deadline — anything that helps us spec the right system.

WE RESPOND WITHIN 1 BUSINESS DAY. NO SPAM.