My 454 exhaust manifold gaskets keep burning up; restrictive exhaust ?

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Seems the last owner installed two 2 inch tubes running to two mufflers in the rear. WHAT IS THE ORIGINAL EXHAUST TUBE SIZE and MUFFLER configuration ? restriction exhaust issue ?

vieques_GMC in San Juan PR

Apr 22, 2015

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Tuffy Tire & Auto Service Center - Grandview

4.7

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2.39 mi

1524 W 5th Ave

Columbus, OH

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5.94 mi

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6.56 mi

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4.3

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6.67 mi

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Blackstone Complete Auto Care

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6.77 mi

4800 Sinclair Road

Columbus, OH

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Boyd's Tire & Service - Columbus

4.7

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7.23 mi

5263 Godown Rd

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Tuffy Tire & Auto Service Center - Grandview

4.7

(89)

2.39 mi

1524 W 5th Ave

Columbus, OH

Closed

Opens 8:00 AM Wed

Call

Excite Auto Repair & Towing

4.4

(15)

5.94 mi

3430 Westerville Road

Columbus, OH

Closed

Opens 9:00 AM Wed

Call

All In Auto Service

4.6

(37)

6.56 mi

5200 Fisher Road

Columbus, OH

Closed

Opens 8:00 AM Wed

Call

Tuffy Tire & Auto Service - Grove City

4.3

(525)

6.67 mi

2131 Stringtown Rd

Grove City, OH

Closed

Opens 7:30 AM Wed

Call

Blackstone Complete Auto Care

(39)

6.77 mi

4800 Sinclair Road

Columbus, OH

Closed

Opens 9:00 AM Wed

Call

Boyd's Tire & Service - Columbus

4.7

(193)

7.23 mi

5263 Godown Rd

Columbus, OH

Closed

Opens 8:00 AM Wed

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